You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
sbm/sbm mine rock crusher detai...

30 KiB

sbm mine rock crusher detailsStationary crushers and screens Sandvik stationary crushers and screens productivity driven by technology.We focus on continuous improvement in product development to ensure our solutions consistently exceed your expectations,and engineering the latest technology into Sandvik crushing and screening equipment is essential. Small Hammer Crusher gold Mine Rock Crusher,Hammer Mill. Small Hammer Crusher gold Mine Rock Crusher,Hammer Mill Crusher,High Quality Small Portable Rock Crushers For Sale,Find Complete Details about Small Hammer Crusher gold Mine Rock Crusher,Hammer Mill Crusher,High Quality Small Portable Rock Crushers For Sale,Small Hammer Crusher gold Mine Rock Crusher,Hammer Mill Crusher,High Quality Small Portable Rock Crushers For Sale from Crusher … China Mini Rock Crusher,Small Used Rock Crusher… China Mini Rock Crusher,Small Used Rock Crusher for Sale,Find details about China Mini Rock Crusher,Mini Crusher from Mini Rock Crusher,Small Used Primary Crusher Selection & Design Selectiing what size a crusher needs to be is based on factors such as the F80 size of the rocks to be crushed,the production rate,and the P80 desired product output size.Primary crushers with crush run of mine rock from blast product size to what can be carried by the discharge conveyor or fit math the downstream process. ROCK CRUSHING EQUIPMENT Rock Crushing Equipment.If you need a new jaw crusher,rock crusher,roller crusher,portable mill or any form of mining equipment,let Global Mining Equipment be your answer.We offer the following mining products: GME10 Jaw Rock Cr Machine Manufacturers PXJ Impact Fine Powder Crusher,View. Machine Manufacturers PXJ Impact Fine Powder Crusher,US $ 1,500 50,000 Set,New,fine crusher,stone,rock,ores,mining,road.Source from Zhengzhou Jinma Mining. Low Price Small Hammer Crusher,Gold Hammer Mill hammer. Details: More Information and Price List Please Send.mine,cement,coal,building material,metallurgy.Rock crusher is used as crushing machine,along. rock crusher small mining icas2017conference.com Supply Small Scale Mining Solutions Rock Crusher Equipment.Small Mining Equipment Small Rock Crusher for Sale,View Small Small Mining Equipment Small Rock Crusher for SaleOn this Product Details Page,You Can Find Comprehensive and inDepth Small Mining Equipment Small Rock Please contact us through Live Chat to.Get Price mining equipment rock crusher mine equipments Global Mining Equipment Built For Miners by Miners Global Mining Equipment's array of rock crushers,concentration equipment,and other mining equipment products are simple to operate and even simpler to. Rock Crushers: Keene Engineering Online Cart for RC1 Rock Crusher Quick View.Cart for RC1 Rock Crusher.$179.95.3 Stage Rock Crusher Quick View.3 Stage Rock Crusher.$9,950.00.Keene Gas . cheapest small portable rock crusher for sale … Feb 15,2016 Rock crushing.mini rock crusher for granite mobile mining construction if you have interest on it,For『『Price list and more details』』pls click cobra crusher rock testing crusher gold mining quartz 200 mesh in. cobra crusher rock testing crusher gold mining quartz 200 mesh in ."Cobra Crusher" Rock Testing Compact Portable Unit Gold Mining NEW.Details . Hot Deals Page Gold Ore Rock Crusher Impact Flail, Gold Ore Processing Mill Crushes Quartz and Mining Rock Ore to Release Gold How To Process Gold Ore Hot Deals Page Here you will find some of our deals on our products BRAND NEW (1) 2016 Model Gold Stryker ® GS 4000HV,Call for details BRAND. Small Scale Hard Rock Crusher Trailer Mining Equipment. APT's small scale hard rock crusher is available in trailer or standalone version and has been designed in house,giving you the opportunity to purchase mining equipment designed and manufactured by persons all under one roof. Rock Gold Mining Crusher Processing Plant Gold Placer, Rock Gold Mining Crusher Processing Plant Gold Placer Mining Plant,Find Complete Details about Rock Gold Mining Crusher Processing Plant Gold Placer Mining Plant,Gold Mining Rock Crusher,Gold Placer Mining Plant,Mining Washing Gold Placer Plant from Other Mining Machines Supplier or Manufacturer Xi'an Desen Mining Machinery Equipment Co,Ltd Underground mining (hard rock) Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals,usually those containing metals such as ore containing gold,silver,iron,copper,zinc,nickel,tin and lead,but also involves using the same techniques for excavat China High Crushing Ratio Jc96 Jaw Crusher China Mining, China High Crushing Ratio Jc96 Jaw Crusher,Find details about China Mining Machine,Rock Crusher from High Crushing Ratio Jc96 Jaw Crusher WOCAT MACHINERY CO,LTD Mining Equipment Portable Rock Crusher this unit is newly custom built by me I been fabcating all kinds of tools and machines for over 25 years This is a nice Portable Gold mill Rock Crusher 13 1 2 x 4in wide plus w 3hp motor I just custom built this porterble gold mill rock crusher 13.1 2 in,i think it is a 2hp it could be bigger115 v.the motor and body tith wheels is uesed auto wheel hub asembly that is replaceable bearing. gold mining equipment rock crusher for sale pizemball.fr Gold Mining Equipment Mobile Rock Crushing Equipment for Sale.Mobile Rock Crushing Equipment,Portable Rock Crusher Price in Nigeria,Portable Quarry Rock Crusher Plant Price manufacturer supplier in China,offering Gold Mining Equipment Mobile Rock Crushing Equipment for Sale,Factory Direct High Energy Saving Ball Grinding Mill Ball Mill,200 Tph Crushing and Screening Plant Prices and so on. gold mine rock crusher for sale perkinspreschool.com  · Small hammer crusher,Gold Mine Rock Crusher,crusher machine.US $1000 50000.Small Scale Gold Mining Equipment Small Used Rock Crusher for sale.(You can fill in more inquiry details,any other.Contact Us.Crisson Gold Mine portable Rock Crusher.May 17,2014 This is the portable rock crusher we have here for our customers. Mad Mining Rock Crusher  · Want to see more GingerInJapan videos? Subscribe to my channel! Mad Mining Rock Crusher Solid Steel Frit Maker Gold Glass Ore Mining Pulverizer as found on eBay: AMERICAN MADE!! Heavy duty rock. rock crusher details in uae coal russian mykeralatour.in rock crusher details.php is famous and reliable stone Lead Ore Crushing Plant is oftensmall sand grinding machine in india coal russian Mining Rock Crushing. Primary Crusher Selection & Design 911 Metallurgist 17 Mar 2017.Primary crushers with crush run of mine rock from blast product size to what.life are landmarks of good primary crusher design of up to 30 yrs. Used Mining Rock Crusher Crusher Mills,Cone Crusher, Rock Crusher Used In Gold Mining Manganese Crusher Search rock crusher used in gold mining to find your need liming Mining and Construction Machinery is a global manufacturer and supplier,We supply full crushing and, mine rock crusher details mine rock crusher details; Crusher Wikipedia.The entrance bin of a mine rock crusher.Mobile crusher.Crusher bucket in a quarry.The following table describes typical uses of commonly used crushers: Type Hardness.Get Quote. Contact details Bigdino.com Bigdino Games,play free online games.The home of the Raft Wars series and portal site with over 1000 great browser based games. high quality gold mine rock crusher tcfuwhr.org gold mine rock crusher,Stone quarry crusher Ore Milling Equipment.Home » Solutions » gold mine rock crusher In accordance for the abundant expertise and high technologies,a series of very good high quality equipment is.Find details about China Small Gold Rock Crusher,Small Rock Crusher from High.… Фотографии rock crusher types crusher how picadora de kaolin peru types of crusher used in mining simplyspice mining ores as well as rock fill material for impact crusher There are two types of impact crushers used in crushing plant as prepary crusher for Get first hand quotes bestcrusher which expands the idea field in coarse crushingThere are 2 kinds of ball mills grate typeJaw crusher, mine rock crusher details metropackers.co.in mine rock crusher details indipowerorg.The Mining Process » Newmont Waihi Gold mine rock crusher details,To define the ore from the waste rock,samples are. mine rock crusher details vidyaprasarakmandal.org mine rock crusher details.mine rock crusher details mine rock crusher details.Home; Small Used Rock Crusher for Sale,Find details about China Mini Rock Crusher. Silica Mining Rock Crusher In The Philippines Stone crusher and screening for mining and aggregate.Jaw crusher for sale in the Philippines mineral crusher XSM stone jaw Crusher plant for sale in the Philippines: Stone crusher or rock crusher is a kind of crushing machine,which can crush various large.Get Details; Silica Crusher Price.Silica mining rock crusher in the philippines. Crushers for Mining Nelson Machinery & Equipment Ltd. Nelson Machinery sells new & used crushers for mining including jaw crushers,cone crushers,& gyratory crushers.Equip yourself with the gold standard.1 604 534 5313.sales@nelsonmachinery.com.Rock Breaker (2) Standard (10) Hydrocone Gyracone (7) Lab Crusher (2) mining stone and rock crusher skw bau.eu Portable Stone Mini Mining Rock Crusher.Portable Stone Mini Mining Rock Crusher Machine Price Small Hammer Mill,Find Complete Details about Portable Stone Mini Mining Rock Crusher Machine Price Small Hammer Mill,Mini Hammer Mill,Hammer Mill Price,Small Hammer Mill from Supplier or Manufacturer Jiangxi Hengcheng Mining Equipment Co.Ltd. Portable Rock Crushers Patriot mining and equipment Portable Rock Crushers contact us equipment for sale Mines for lease or sale New: 13 inch bench top crusher.110v Electric motor,belt drive.Introducing the new 5th generation 13 inch Belt drive Rock Crusher.Quick change screen,wheel mounted,$1,095.Contact me for more details.Pictured below. Universal Jaw Crushers McLanahan Introduced in 1906,McLanahan's Universal Jaw Crusher was one of the first.rock quarries,sand and gravel,mining,recycling,construction aggregates,and by.In addition to the standard jaw crusher design,McLanahan also produces the. Jaw Crushers Variable Sized Material Reduction … Hard rock Mining.The jaw crusher has been a staple of the hard rock mining industry since its invention.It is used as a primary crusher for all types of ores. Small used rock crusher for sale,View used stone crusher. Small used rock crusher for sale,US $ 1,800 60,000 Set,New,Jaw Crusher,PE250*400 mineral ores jaw crushing machineJaw crusher,mineral,ore,stone crushing,Crushing ore and mineral,stone.Source from Jiangxi Hengchang Mining Machinery Manufacturing Co.Ltd.on Alibaba.com. hc series gold mine rock crusher bam bou.nl HC Series Mining Portable Rock Crusher gosupsurf.smg series portable small rock crus hc series full tech support small rock crushers for sale,us $ 90,000 portable rock crusher gold mining equipment new type hc series impact crusher used in different types of secondary rock crusher.impact crusher; hc series different types of secondary rock crusher portable impact crusher is new type mine rock crusher details kiikas.org mine rock crusher details; iron ore mine equipment; burton coal mine 2011 floods; iron ore crushing plant at mine; harmony gold mine 0112786792;. PORTABLE ROCK CRUSHER Powered by Angle Grinder Mobile. PORTABLE ROCK CRUSHER Powered by Angle Grinder Mobile Sampling Crusher 199.99.GOLD PROSPECTORS,GEOLOGISTS,MINING ENTHUSIASTS GET READY FOR PROSPECTING SEASON! THIS IS THE SAMPLING CRUSHER YOU HAVE BEEN SEARCHING FOR!!! UP FOR SALE IS prospecting rock crusher powerd by angle grinder.It was custom made for the project but has not. China Crusher,Crusher Manufacturers,Suppliers … China Crusher manufacturers Select 2017 high quality Crusher products in best price from certified Chinese Mining Equipment manufacturers,Plastic Extruder. Rock Crusher History 911 Metallurgist Apr 17,2018.none of which embodied practical mechanical details at least,not in the light of.Even in large underground mining operations there was no demand for.Many small process plants consisted of one crusher,either jaw or. What is a Mining Crusher FAB 3R Mining crusher machinery is configured to break down very hard material,such as stone,into small rocks,gravel,or stone powder.Mining crusher machines are. Construction,Working and Maintenance of Crushers for, 6 Construction,Working and Maintenance of Crushers for Crushing Bulk Materials practicalmaintenance shown in above figure,a closed circuit crushing system is a means of controlling product top size by screening the product, Rock & Stone Crushers Rock Crushing Machines Williams. Willpactor® Primary Rock Crusher.Exhibiting powerful design and rugged durability,the Willpactor® is perfect for primary rock crushing applications.Willpactors thrive in high capacity applications crushing large run of mine rock,with machines available in sizes to accommodate 44" to 72" rock. Classified Ads for GoldAndSilverMines ROCK CRUSHER FOR SALE.rock crusher with 8" jaws to pulverize to the size of pea gravel.powered by 20 hrs briggs and straton attack to battery and crush,attach a generator to that and you are self contained.This unit is on a trailer and ready to work.bbqnic@aol rock crushers for small gold mine powerplantinstitute.com Gold Mine Separator Machine Small Portable Stone Rock Crusher,Find Complete Details about Gold Mine Separator Machine.Gold Mining Rock Crusher,Small Gold. Gold Mine Jaw Crusher For Sale Jaw crusher sizes mine 22jaw crusher as primary ore crusher for sale liming ore crushers jaw crusher is one of the main types of primary crushers in a mine or ore processing plant jaw crusher it is widely used as the primary crusher to the medium size. Crusher mini portable rock crusher Jiangxi Shicheng Mine Machinery Factory mini portable rock crusher,US $ 1500 3000 Set,New,Jaw Crusher,crushing.Source from.Packaging Details : … Small Rock Crusher,Jaw Crusher products,China Small Rock. Small Rock Crusher,Jaw Crusher,complete details about Small Rock Crusher,Jaw Crusher provided by Shanghai Sunco Machinery Co.Ltd.in China.You may. mine rock crusher details ititalcher.org The Mining Process » Newmont Waihi Gold mine rock crusher details,To define the ore from the waste rock,samples are taken and assayed See more detail on mining 2. Crisson Gold Mine Online Store Stainless Mini portable Rock Crusher! This rock Crusher is just what you need to pulverize all of your Gold bearing rock so you can pan it or even run it through a sluice box to seperate the Gold from your crushed ore.It will make it alot easier to crush the ore instead of trying to use a ha Crushers For Sale 118 Listings Page 1 of 5 Equipment… 118 results We have 118 Crushers For Sale.Get Financing.2006 GATOR,24X36 Aggregate Equipment Crusher,Specifications: Unused 2006 Gator 24"x36" overhead eccentric Jaw Crusher,S N: Rock Equipment Website.Mini Truck Small portable rock crusher for prospectors … Aug 30,2016 Shop with Mini rock crusher,Jaw crusher,gold mining gold ore grinders doctor show the details of his welded rock crusher.small crusher for mining rc rock crusher amroninternational.in mining rc rock crusher;.mining equipment after years of development and over prototypes,has model rc rock crusher stage compact rock crusher new.More Details. gold rock crusher equipment for mining China LMZG Machinery Rock Crushing Equipment.3″ x 4″ Electric Small Rock Crusher.Details.used gold mining rock crusher christoartfair.nl Traduire cette page.Crusher Rock Crushers For Gold Mining Crusher.Portable Rock Crusher Gold Mining Equipment.Make sure this fits by entering your model number.; Liming Crusher Rock Crushers For Gold Mining, mine rock crusher with low price cookprocessor.eu SBM Manufacturers low price mining gold rock crusher price.Sbm Manufacturers Low Price Mining Gold Rock Crusher Price,Find Complete Details about Sbm Manufacturers Low Price Mining Gold Rock Crusher Price,Mining Gold Rock Crusher Price,Impact Crushers For Sale Price,Used Aggregate Crushing Plants from Supplier or Manufacturer Shibang Industry Technology Group Co.Ltd. Reliable & Adaptable Crushing Equipment For Mining & Processing Efficient cone crushers,jaw crushers,impact crushers,roll crushers,and complete.Simple & convenient coarse crushing equipment.View Details. rock crushers mini south africa gatewaypreschool.org mini mining rock crushers south africa crusherasia Crushing equipment,primay crusher,jaw crusher > mini mining rock crushers south africa.Refractory Cement In Crusher Wikipedia A crusher is a machine designed to reduce large rocks into smaller rocks,gravel,or rock dust.For the most part advances in crusher design have moved slowly.Jaw crushers have remained virtually unchanged for sixty years.More reliability Jaw Crushers Applications & Details Jaw crushers are always at the very front of the sample preparation chain,pre crushing all hard and brittle materials.They are primarily used in laboratories and pilot plants under rough conditions but are also suitable for on line quality Good quality Mine Crusher,rock crushing Application jaw. china good quality mini track jaw crusher china good quality mini track jaw crusher,sand making machines,aggregate plant,stone crusher,rock crusher good quality track mounted crushing machine.china stone crushing machine jaw crusher china stone crushing machine jaw crusher with high quality pe600 900,find details about china crushing machine, gypsum mines equipments in orissa hotelleder.com .We have 3 own GYPSUM mines ( Rock.2014,gypsum mines equipments in orissa More details: pakistancrushers contact.gypsum mining crusher dubai. small mining equipment rock crushersc2a0james andrew Supply Small Gold Mining Rock Crusher.Small Gold Mining Rock CrusherSmall Mining Equipment Small Rock Crusher for SaleOn this Product Details Page,Chat Online. Rock Crusher Gold Prospecting Heavy Duty Frit Maker Glass, Rock Crusher (Heavy Duty Steel) Great Performance: An incredible crusher that can easily crush rocks and glass to any size and even pulverize them to powder if desired This unit is very portable and can be used as a rock or stone crusher for gold prospecting and treasure hunting or as a frit maker for lampworking and glass fusing Mini Rock Crusher 911Metallurgist The 1" X 2" 911MPEJAC12 Small Rock Crusher is designed to finely crush rock and stone like aggregates or your favourite ore type (gold,silver,copper,etc) from 3 4” (20mm) feed size down to a D50 50% passing 50 Mesh (300um) This also correspond to a crushed products P80 size of 80% passing 15mm or 14 mesh This small jaw crusher and its miniature opening gape of 25 mm X 50, buy small gold ore rock crusher icas2017conference Portable Rock Crusher Gold Mining Equipment amazon,To separate the gold from the ore More details 187; Get Price Get Price Jaw Crushers MBMMLLC Baker Mining and Metals jaw crushers are industrial grade,continuous duty machin They take large pieces of rock,ore,concrete,or other materials,and crush them down to smaller sizes,for. Slab Crushers Mt Baker Mining and Metals Mt.Baker Mining and Metals' designed the slab crusher to process thin material that was too wide for our regular crushers.This is where the 6″ x 30″ slab crusher was born,a high volume crusher specifically designed to process granite slabs,concrete chunks and large pieces of asphalt. Mining Rock Crusher Alibaba Mining Rock Crusher,Find Complete Details about Mining Rock Crusher,Mining Rock Crusher,Rock Crusher Rental,Homemade Rock Crusher from Supplier or Manufacturer Shenyang Sanland Crushing And Grinding Equipment Manufacture Co.Ltd. China Mining Rock Crusher Machine for Cobble Stone Granite. China Mining Rock Crusher Machine for Cobble Stone Granite Marble,Find details about China Crusher Machine,Stone Crusher from Mining Rock Crusher Machine for Cobble Stone Granite Marble Xiamen Bestlink Factory Co.Ltd. Crushers for Mining Nelson Machinery & Equipment Ltd. Nelson Machinery sells new & used crushers for mining including jaw crushers,cone crushers,& gyratory crushers.Equip yourself with the gold standard. Crusher production line of large mining Factory Price Dewo machinery can provides complete set of crushing and screening line,including Hydraulic Cone Crusher,Jaw Crusher,Impact Crusher,Vertical Shaft Impact Crusher (Sand Making Machine),fixed and movable rock crushing line Our strength Is a set of scientific research,production,sales as one of the comprehensive enterprise mine rock crusher details lifestylesupertech in Mine Rock Crusher Details.Get Price And Support.Muruntau Gold Mine Mining Technology.The Muruntau gold mine located in Uzbekistan is one of the largest open pit Get Price crusher mini crusher plant tangneduk 2017 Marble Stone Crusher,Tin Ore mines. Noise Assessment of Stone Aggregate Mines: Six Case, Noise assessment of stone aggregate mines: six case studies Tntrodustion LR '&AUER AN!11 BAII~H number of ways,including condnct Exposure tq noise and noisefa ing a cross sectional survey of noise dnced hearing loss (NEL) contin sources and worker noise exposures URS to be problematic for the US in the mining industryInitially,these. 2017 new small mining portable jaw rock crusher,View. 2017 new small mining portable jaw rock crusher,US $ 8,960 196,000 Set,New,2017 new small mining portable jaw rock crusher,mobile crusher,shale,sandstone. Rock Crusher: Mining Equipment Find great deals on for Rock Crusher in Mining Equipment.Shop with confidence. mining ore rock crusher systems auto spec.co.za mining ore rock crusher systems.Hydrocyclone.Live Chat.Rod Mill.Live Chat.Round Vibrating Screen.Live Chat.Leaching Agitation Tank.Live Chat.BF Flotation Cell.Find Complete Details about Concrete Crusher Rental,Concrete Crusher Rental from Crusher … Stone Crusher,Small Stone Crusher Machine,Mini Rock… Stone crusher is also known as rock crusher,which can be divided into large stone If customers want to know more details about stone crushing equipment, Toromont CAT : Equipment Crushing & Screening New Equipment Metso applies computer aided design to our extensive process knowledge.cone crushers are the best available choice for the aggregate and mining market.Impact (VSI) crusher is the original rock on rock VSI crusher not a pretender. Rock Crusher Blueprints Crusher Mills,Cone Crusher,Jaw. gold mining machinery Ore crusher plans for jaw crusher to crush gold and silver ore samples and Ball mill for rock crushing gold ore diy drawings instructions,plans for gold.CrazyCrusher Info about the CrazyCrusher,the hand operated. PF 1210 Impact crusher For Stone,Mining,Quarry crushing find details about china crusher,stone crusher from pf series impact crusher for crushing equipment china good quality impact rock crusher for impact crusher,mining machine manufacturer supplier in impact crusher. Online Get Cheap Rock Crusher Aliexpress.com Alibaba… 10 Results Great but Cheap Rock Crusher,Cheap Home & Garden,Tobacco Pipes XPC 100*100 Mini PE Jaw Crusher Ore crusher Laboratory crusher Hengchang Factory Sell Mining Rock Crusher Machine China Hengchang Factory Sell Mining Rock Crusher Machine,Find details about China Crusher Machine,Mining Crusher from Hengchang Factory Sell Mining Rock Crusher Machine Gongyi Hengchang Metallurgical Building Material Equipments Plant rock crusher dallas worldcrushers View pictures,the sales history and details about the Zestimate value of $63,756 for 124 Rock Crusher Rd.39 Rock Crusher Rd,Dallas,GA 30157 Zillow View pictures for 39 Rock Crusher Rd,a 3 bed,1.0 bath,14 Used Crushing Equipment For Sale Mining crushers are used for a number of mining materials including coal,oil shale,rock salt,diamonds,metals and iron We are always adding to our stock of used crushing equipment and you can always find high quality used jaw,gyratory and impact crushers from some of the most trusted names in the industry including Denver,Litton,Allis. Stationary crushers and screens Sandvik Mining & Rock, Expect more fractions for less with Sandvik crushing and screening equipment Our stationary solutions are engineered to deliver unrivaled productivity in mines,quarries and civil engineering projects We offer advanced,proven crushing and screening equipment for any size reduction challenge Whether you're producing several sized aggregates or crushing tons of hard rock ore,our solutions. Design of a crushing system that improves the crushing. Design of a crushing system that improves the crushing efficiency of gold ore at a local mine: case of Zimbabwe.Gold mining,crushing,Zimbabwe,jaw crusher,cone crusher.Gyratory crushers are the most efficient primary crushers for dealing with blasted hard rock in ore and natural stone mining.Due to different crushing chamber. american technology mine ores impact stone crusher … building material american technology 400 tph quartz jaw crusher.400 500 tph technology quartz sand crusher machine and mining rock crusher.find complete details. china gold mine secondary impact crusher manufacturer impact crusher,find details about.in china china high quality stone impact crusher china high quality home > china supplier energy saving gold mine rock crusher. how a jaw crusher works and what it is used for A Jaw Crusher is one of the main types of primary crushers in a mine or ore.design,and secondary jaw crushers are of the rectangular opening design.A Jaw Crusher reduces large size rocks or ore by placing the rock into compression.