机械制造类专业英语 教案 Module two Mechanical Machining

PAGEPAGE23SceneOneMechanicalMaterialsBeforeyoustepintothisscene,pleaselearnbyheartthefollowingwordsandexpressionswithyourclassmatesbylookingupthedictionaryorsurfingtheinternet.LookatthefollowingwordswemayuseinthissceneandmatchtheEnglishandChinesemeaning.Thefollowingexpressionswemayuse,beforewefinishoffthetaskpleasemakeouttheirChinesemeaningwiththehelpofyourteammatesordictionaryorsurfingtheinternet.characteristica.特有的n.特性metallica.金属的nonmetallica.非金属的organica.有机的infinitea.无穷的n.无尽commerciala.商业上的，商业的oxiden.氧化物sulfiden.硫化物carbonaten.碳酸盐，黑金刚石refinev.精炼，提纯optimumn.（复数optima）最适合条件lathen.车床flexibilityn.机动性，灵活性supervisionn.监督，管理camn.凸轮suiteto适于nonferrousmetal有色金属general-purpose普通用途special-purpose特殊differfrom…与…不同either…or…既…又…notonly…butalso…不仅…而且…Thematerialandtheprocessbeunderstoodinthedesignandmanufactureofaproduct.Materialsdifferwidelyinphysicalproperties,machinabilitycharacteristics,methodsofforming,andpossibleservicelifeMechanicalmaterialsfallintotwobasictypes:metallicornon-metallic.Non-metallicmaterialsarefurtherclassifiedasorganicorinorganicsubstances.Weshouldpaymoreattentiontochoosetheappropriatematerialbecausethereisaninfinitenumberofnon-metallicmaterialsandpureaswellasalloyedmetals.Fewcommercialmaterialssuchasoxides,sulfides,orcarbonates,existaselementsinnature.Sotheymustundergoaseparatingorrefiningoperationbeforetheycanbefurtherprocessed.Inmetalworking,ironisthemostimportantnaturalelement.Whencombinedwithotherelementsintovariousalloysitbecomestheleadingengineeringmetal.Thenonferrousmetals,includingcopper,tin,zinc,nickel,magnesium,aluminium,lead,andothersallplayanimportantpartinoureconomy.Activity:MakeasurveyaboutmechanicalengineeringmaterialsinyourworkplaceTaskOne:Listthefactorswehavetoconsiderthedifferencesamongthemechanicalengineermaterialsafterdiscussionwithyourgroupmembers.TaskTwo:pleasefillintheformsaboutthetypesofengineeringmaterials.ferrousferrousOtherelementsVariousalloysnonferrousmetallicMechanicalmaterialsOtherelementsVariousalloysnonferrousmetallicMechanicalmaterialsnon-metallicorganicnon-metallicorganicinorganic inorganicAftertalkingaboutthematerialwithyourgroupmembersandthendoyourbestanswerthefollowingquestionsaccordingtotheabovematerial.Whatfactsshouldthedesignerconsiderinselectinganeconomicalmaterialandaprocessthatisbestsuitedtotheproduct?Fewcommercialmaterialssuchasoxides,sulfides,orcarbonates,existaselementsinnature.Sotheymustundergoaseparatingorrefiningoperationbeforetheycanbefurtherprocessed.Inmetalworking,ironisthemostimportantnaturalelement.Whencombinedwithotherelementsintovariousalloysitbecomestheleadingengineeringmetal.Thenonferrousmetals,includingcopper,tin,zinc,nickel,magnesium,aluminium,lead,andothersallplayanimportantpartinoureconomy.Whichnaturalcompoundsofmetalsdonotexistaselementsinnature?Fewcommercialmaterialssuchasoxides,sulfides,orcarbonates,existaselementsinnatureCanyoulistsomenonferrousmetalsaccordingtotheabovematerial?Thenonferrousmetals,includingcopper,tin,zinc,nickel,magnesium,aluminium,lead,andothersallplayanimportantpartinoureconomy.Manufacturingrequirestoolsandmachinesthatcanproduceeconomicallyandaccurately.Economydependsontheproperselectionofthemachineorprocessthatwillgiveasatisfactoryfinishedproduct,itsoptimumoperation,andmaximumperformanceoflabourandsupportfacilities.Insmall-lotorjobshopmanufacturing,general-purposemachinessuchasthelathe,drillpress,andmillingmachinemayprovetobethebestbecausetheyareadaptable,havelowerinitialcost,requirelessmaintenance,andpossesstheflexibilitytomeetchangingconditions.Asimpleboltmaybeproducedoneitheralatheoranautomaticscrewmachine.Thelatheoperatormustknownotonlyhowtomaketheboltbutmustalsobesufficientlyskilledtooperatethemachine.Ontheautomaticmachinethesequenceofoperationsandmovementsoftoolsarecontrolledbycamsandstops,andeachitemproducedisidenticalwiththepreviousone.Oftenitisuneconomicaltomakeamachinecompletelyautomatic.Becausethecostmaybecomeprohibitive.Mostpartscanbeproducedbyseveralmethods,butusuallythereisonewaythatismosteconomical.Factorsthatmustbeconsideredarevolumeofproduction,qualityofthefinishedproduct,andtheadvantagesandlimitationsoftheequipmentcapableofdoingthework.Mostpartscanbeproducedbyseveralmethods,butusuallythereisonewaythatismosteconomical.Readingtheaboveinformationwiththehelpofyourclassmates,trytounderstandthemeaningofitandthenfillintheblanksinthefollowingshortparagraph.Manufacturingrequirestoolsandmachinesthatcanproduceeconomicallyandaccurately.Economydependsontheproperselectionofthemachineorprocessthatwillgiveasatisfactoryfinishedproduct,itsoptimumoperation,andmaximumperformanceoflabourandsupportfacilities.Insmall-lotorjobshopmanufacturing,general-purposemachinessuchasthelathe,drillpress,andmillingmachinemayprovetobethebestbecausetheyareadaptable,havelowerinitialcost,requirelessmaintenance,andpossesstheflexibilitytomeetchangingconditions.Discussionwithyourcolleaguesandtrytosharetheideasofyourpartnersandthenmakesurewhichofthefollowingexpressionisrightorwrong.RightforTandwrongforF（√）general-purposemachinesmayprovetobethebestinsmall-lotorjobshopmanufacturing.（√）lathe,drillpress,andmillingmachinemaymeetchangingconditionssincetheyareadaptable,havelowerinitialcost,requirelessmaintenance,andpossesstheflexibilityto.（√）Tooperatethemachine,thelatheoperatormustknowbothhowtomaketheboltandbesufficientlyskilled.Surveyyourfactoryattachedtoyourcollegeandmakeitclearthatwhyitisuneconomicaltomakeamachinecompletelyautomatic,talkingaboutitinyourgroup.Readthelastparagraphoftheabovematerialanddoyourbesttoanswerthefollowingquestionwiththehelpofyourclassmates.RefertothereadingmaterialsSceneTwoElectricalmachiningBeforeyoustepintothisscene,pleaselearnbyheartthefollowingwordsandexpressionswithyourclassmatesbylookingupthedictionaryorsurfingtheinternet.LookatthefollowingwordswemayuseinthissceneandtrytomakeouttheirChinesemeaninginagiventime,whoeverfinishesoffitfirstwillbethewinner.Unique唯一的，独特的Odd奇数的，单数的Dissimilar不同的，相异的Electrochemical电气化学的Comeabout发生，出现Dueto由于Space-age空间时代Time-consuming费时的Incontrast相比之下，相反，可是Uniqueto……所独有的Electrochemicalmachining电化学加工Electrochemicalgrinding电化学磨削Mostelectricalmachiningprocesseshavecomeaboutduetothedevelopmentofapace-agemetalalloysthataretoughandhardtomachine.Grindingcutting,andshapingwithcuttingtoolsareexacting,time-consuming,andexpensiveprocessesonsuchalloys.Insomecases,machiningwithconventionalequipmentisalmostimpossible.Amaterialliketungstencarbide,forexample,isverydifficulttomachineevenwithdiamondcuttingtools.Readtheaboveparagraphoftheabovematerialanddoyourbesttoanswerthefollowingquestionwiththehelpofyourclassmates.RefertomaterialReadthroughtheaboveinformationagainwithyourworkmatesandtrytofillintheblanksinthefollowingshortpassage.Mostelectricalmachiningprocesseshavecomeaboutduetothedevelopmentofapace-agemetalalloysthataretoughandhardtomachine.Grindingcutting,andshapingwithcuttingtoolsareexacting,time-consuming,andexpensiveprocessesonsuchalloys.Insomecases,machiningwithconventionalequipmentisalmostimpossible.ReadtheaboveunderlinedmaterialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.RefertomaterialOnstandardmachinetools,electricalenergyisconvertedbyanelectricmotorintomotionthatistransmittedthroughaseriesofshafts,pulleys,belts,andgearstoacuttingtool.Incontrast,theelectricalmachiningprocessesmakedirectuseofelectricalenergy.Thisresultsincertainabilitiesthatareuniquetotheseprocesses,machiningwithouttoolrotationorwithouttouchingtheworkpiece,machiningoddshapes,andmachiningdissimilarmetalswithoutloadingthetool.ThreemajorelectricalmachiningprocessesareEDM(electricaldischargemachining),ECM(electrochemicalmachining),andECG(electrochemicalgrinding)Readtheabovematerialsfirstwithyourcolleaguesandthentryyourbesttogiveoutthedefinitionofelectricalmachining..RefertomaterialGroupactivities.WorkwithyourgroupmembersandreadtheaboveinformationagainandtryyourbesttotranslatethefollowingtermsintoChinese.Thendictatethemamongyourgroupmembers.workpieceelectricalmachiningprocessesgearselectricalenergyelectricmotorshaftscuttingtoolbeltspulleysoddshapesloadingthetoolSurveyyourworkplaceandobservecarefully,makeouttheprocessofelectricalmachiningandaskthemasterforhelpifanyproblems,writedownyourexperiencesinyourworkplace.Refertomaterial Workwithyourworkmatesreadingtheabovematerialcarefullyandthentrytounderstandthekindsofprocessesofelectricalmachining.Pleasecooperatewithyourpartnersandwritedownyouranswers.Readtheaboveparagraphoftheabovematerialanddoyourbesttoanswerthefollowingquestionwiththehelpofyourclassmates.RefertomaterialReadtheaboveinformationagainwithyourroommateandalsoobserveyourworkplacecarefullyandthenwritedowntheadvantagesofelectricalmachining?RefertomaterialSceneOneLatheBeforeyoustepintothisscene,pleaselearnbyheartthefollowingwordsandexpressionswithyourclassmatesbylookingupthedictionaryorsurfingtheinternet.LookatthefollowingwordswemayuseinthissceneandmatchtheEnglishandChinesemeaninginagiventime,whoeverfinishesoffitfirstwillbethewinner.Drillingn.钻削Millingn.铳削Fastenv.固定，加固，连接Feedn.进给，送给Cuttern.刀具Clampn.夹子Carriagevt.溜板Bedn床Headstockn.主轴箱Tailstockn.尾架Slidev.滑动Metalworkn.金属制品Spindlen.主轴Wobblevi.摇晃Alignmentn.队列Micrometern.千分尺Thefollowingexpressionswemayuse,beforewefinishoffthetaskpleasemakeouttheirEnglishmeaningwiththehelpofyourteammatesordictionaryorsurfingtheinternet.机床铳床刀座主轴顶尖尾架顶尖Alatheisamachinetoolforcuttingmetalfromthesurfaceofaroundworkfastenedbetweenthetwolathecentersandturningarounditsaxis.Inturningtheworkacuttermovesinthedirectionparalleltotheaxisofrotationoftheworkoratanangletothisaxis,cuttingoffthemetalfromthesurfaceofthework.Thismovementofthecutteriscalledthefeed.Thecutterisclampedinthesurfaceofthetoolpostwhichismountedonthecarriage.Thecarriageisthemechanismfeedingthecutterintheneededdirection.Thelathehandmayfeedthecutterbyhandormaymakeitbefedautomaticallybymeansofspecialgears.Thelargestpartofthelatheiscalledthebedonwhichtheheadstockandthetailstockarefastenedatoppositeends.Ontheupperpartofthebedtherearespecialwaysuponwhichthecarriageandthetailstockslide.Thetwolathecentersaremountedintwospindles:oneisheldintheheadstockspindle,whiletheother(theheadcenter)inthetailstockspindle.Readtheaboveparagraphoftheabovematerialanddoyourbesttoanswerthefollowingquestionwiththehelpofyourclassmates.RefertoreadingmaterialsGroupactivities.Workwithyourgroupmembersandreadtheaboveinformationagainandtryyourbesttosolvethefollowingproblems.Pleaselisttheconstructionofalathewiththehelpofyourworkmates.RefertoreadingmaterialsReadtheaboveunderlinedmaterialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.Firsttranslatethefollowingsentencesaboutthefunctionoftoolswithyourcooperators.RefertoreadingmaterialsReadtheaboveunderlinedmaterialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.WorkwithyourclassmatestryingtotranslatethefollowingphrasesintoChinese.latheroundworkaxisturningtheworkparalleltotheaxisangletothisaxiscutterfeedclampedtoolpostcarriagelathehandRefertoreadingmaterialsThelathechuckisusedforchuckingthework,whichisforclampingitsothatitwillrotatewithoutwobblingwhileturningthechuck,usually,mountedontheheadstockspindlemayhavedifferentsizesandconstruction.Iftheworkisperfectlyround,itmaybechuckedintheso-calledthree-jawuniversalchuck,allthejawsofwhicharemovedtothecenterbyturningthescrew.Butiftheworkisnotperfectlyround,thefour-jawindependentchuckshouldbeused.Inturningdifferentmaterialsandworksofdifferentdiameters,lathesmustberunatdifferentspeeds.thegearboxcontainedintheheadstockmakesitpossibletorunthelatheatvariousspeeds.Beforeturningaworkthelathe,thelathecenteristobealigned:thatmeansthattheaxesofbothcentersmustbeononeline.Thealignmentofthelathecentersmaybetestedbytakingacutandthenmeasuringbothendsofthecutwithamicrometer.Notallworksshouldbefastenedbetweenthetwocentersofthelathe.Ashortworkmaybeturnedwithoutusingthedeadcenter,bysimplychuckingitproperlyatthespindleoftheheadstock.Discussionwithyourcolleaguesandtrytosharetheideasofyourpartnersandthenmakesurewhichofthefollowingexpressionisrightorwrong.RightforTandwrongforFQuizQuestions.TickthecorrectresponseintherelevantboxTaskOne:RefertoreadingmaterialsReadthroughtheaboveinformationagainwithyourworkmatesandtrytofillintheblanksinthefollowingshortpassage.RefertoreadingmaterialsReadtheaboveunderlinedmaterialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.WorkwithyourclassmatestryingtotranslatethefollowingphrasesintoChinese.lathechuckclampingwobblingturningthechuckheadstockspindleconstructiongearboxshortworkthree-jawuniversalchuckfour-jawchucklathecenterdeadcenterReadtheabovematerialagainandthendoyourbestmakeouttheChinesemeaningofthefollowingsentenceswiththehelpofyourteammates.RefertoreadingmaterialsSurveyyourworkplaceagainwithyourclassmatesandobservecarefullythenwritedownthemeaningofthefollowingfigures.P50RefertoreadingmaterialsSceneTwoMillingBeforeyoustepintothisscene,pleaselearnbyheartthefollowingwordsandexpressionswithyourclassmatesbylookingupthedictionaryorsurfingtheinternet.LookatthefollowingwordswemayuseinthissceneandmatchtheEnglishandChinesemeaninginagiventime,whoeverfinishesoffitfirstwillbethewinner.Removev旋转Mountv固定Arborn心轴Spacern垫片Bushingn村套Yoken刀杆支架Slitv切开Clockwiseadj顺时针Regularadj规则的

particularadj特别的Horizontaladj水平的Variousadj不同点Variationn变化Kneen升降台Universaladj万能的Elevatevt升高Indexn分度头Stockn台Thefollowingexpressionswemayuse,beforewefinishoffthetaskpleasemakeouttheirEnglishmeaningwiththehelpofyourteammatesordictionaryorsurfingtheinternet.装有分类为分成根据从…….出去虎钳装置横向的RefertoreadingmaterialsThemillingmachineisamachinethatremovesmetalfromtheworkwitharevolvingmillingcutterastheworkisfedagainstit,themillingcutterismountedonanarborwhereitisheldinplacebyspacersorbushings,thearborisfixedinthespindlewithoneend,whiletheotherendofthearborrotatesinthebearingmountedonthearboryoke.Themillingcuttersaregenerallymadefromhighspeedsteelandavailableindifferentsizesandshapes.therearesuchkindsofmillingcuttersascylindricalcutters,endmillingcutters(forfacemilling),formmillingcutters,angularcutters,sideandfacecutters,slittingsaw,etc.thesecuttersmaydifferinthedirectionoftheiroperationi.e.theymaycutrevolvingeitherclockwiseorcounter-clockwise.Regularorirregularshapedworkmaybeproducedonamillingmachine.Designsvaryingaccordingtotheparticularclassofworkwanted.Accordingtothepositionofthespindle,themillingmachinesmaybedividedintotwogroupsofverticalspindlemillingmachinesandhorizontalspindlemillingmachines.Millingmachinesmaybeintovariousclasses.Accordingtovariationingeneraldesignasthe“columnandkneetype”,themanufacturingtypes,andtheplanertypeofmillingmachine.Accordingtothetabledesign,themillingmachinesmaybeclassifiedasuniversalandplainmillingmachines.Readtheaboveparagraphoftheabovematerialanddoyourbesttoanswerthefollowingquestionwiththehelpofyourclassmates.RefertoreadingmaterialsGroupactivities.Workwithyourgroupmembersandreadtheaboveinformationagainandtryyourbesttosolvethefollowingproblems.Writedownthetypesofmillingmachinesaccordingtodifferentcriterion.RefertoreadingmaterialsReadtheabovematerialsagainwithyourworkmatesandthendiscusswithyourcolleaguesfillinthefollowingtableaboutthetypesofmillingcutters.Tickitoutifitis.cylindricalcutters（）endmillingcutters（）sideandfacecutters（）formmillingcutters（）angularcutters（）slittingsaw（）Surveyyourworkplaceagainwithyourclassmatesandobservecarefullythenwritedownthemeaningofthefollowingfigures.Dictatethenewterminologiesforeachotheramongyourgroupmembers.P62kindsofmillingcuttersAPlainmillingcutterBfacemillingcutterCplainmetalslittingsawDsidemillingcutterEanglemillingcutterFT-slotcutterGendmillcutterReadtheabovematerialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.Firsttranslatethefollowingsentencesaboutthefunctionoftoolswithyourcooperators.RefertoreadingmaterialsReadthroughtheaboveinformationagainwithyourworkmatesandtrytofillintheblanksinthefollowingshortpassage.RefertoreadingmaterialsReadthroughtheaboveinformationagainwithyourworkmatesandtrytofillintheblanksaboutthetypesofmillingmachines,putthemintodifferentclassification.①verticalspindlemillingmachines②universalmillingmachines③plainmillingmachines④theplanertypeofmillingmachine⑤horizontalspindlemillingmachines⑥themanufacturingtypes⑦columnandkneetypeGeneraldesignThemostimpartmentpartsofthemillingmachinearestartinglevers,spindle,column,knee,elevatingscrew,table,indexhead,speedlevers,feedlevers,tablemovementlevers,footstock,andarboryoke.Thespindleofthemillingmachineisdrivenbyanelectricmotorthroughatrainofgearsmountedinthecolumn.Thetableoftheplainmillingmachinemaytravelonlyatrightanglestothespindle,whiletheuniversalmillingmachineisprovidedwithatablethatmaybeswiveledonthetransverseslideformillinggearteeth,threadsetc.Variousattachmentsareusedforincreasingtherangeofworkthatcanbeperformedonamillingmachine.Thedividinghead(alsocalledanindexhead)isadeviceusedtodividetheperipheryofapieceworkintoanynumberofequalparts,andtoholdtheworkintherequiredpositionwhilethecutsarebeingmade.Variouskindsofvisesmaybeusedforholdingtheworkinamillingmachine,themostcommonbeingtheplainvise,andtheswivelvise.ReadtheaboveunderlinedmaterialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.WorkwithyourclassmatestryingtotranslatethefollowingphrasesintoChinese.startingleversspindlecolumnkneeelevatingscrewtableindexheadspeedleversfeedleverstablemovementleversfootstockarboryoke.ReadtheabovematerialagainandthendoyourbestmakeouttheChinesemeaningofthefollowingsentenceswiththehelpofyourteammates.RefertoreadingmaterialsDiscussionwithyourcolleaguesandtrytosharetheideasofyourpartnersandthenmakesurewhichofthefollowingexpressionisrightorwrong.RightforTandwrongforFQuizQuestions.TickthecorrectresponseintherelevantboxTaskOne:RefertoreadingmaterialsReadthroughtheaboveinformationagainwithyourworkmatesandthentickoutthefollowingitemswhichbelongtothepartsofamillingmachine.Readthroughtheaboveinformationagainwithyourworkmatesandtrytofillintheblanksinthefollowingshortpassage.RefertoreadingmaterialsSurveyyourworkplaceagainwithyourclassmatesandobservecarefullythenwritedownthemeaningofthefollowingfigures.P63universalmillingmachineRefertoreadingmaterialsSceneSevenRadialdrillingmachinesBeforeyoustepintothisscene,pleaselearnbyheartthefollowingwordsandexpressionswithyourclassmatesbylookingupthedictionaryorsurfingtheinternet.LookatthefollowingwordswemayuseinthissceneandmatchtheEnglishandChinesemeaninginagiventime,whoeverfinishesoffitfirstwillbethewinner.Radialadj半径的Radiallyadv沿径向Handlen把手Armn臂Circlen圆Controln控制Selectvt选择Selectorn选择器Levern杠杆Engagen接合Dealvt量Thefollowingexpressionswemayuse,beforewefinishoffthetaskpleasemakeouttheirEnglishmeaningwiththehelpofyourteammatesordictionaryorsurfingtheinternet.摇臂钻床摇臂选速手柄大量的Theradialdrillingmachineisdesignedforhandlinglargework-piecesthatcannotbeeasilymoved.Thedrillingmachineheadismountedonaheavyradialarmwhichmaybefromthreetotwelveormorefeetlong.Thisarmcanberaisedorloweredwithpowerandcanbeturnedinacompletecirclearoundthecolumn.Thedrillingheadmovesbackandforthalongthisarm.Onmostradialdrillingmachines,movementofthearm,drillhead,andspindleiscontrolledbypower.Readtheaboveparagraphoftheabovematerialanddoyourbesttoanswerthefollowingquestionwiththehelpofyourclassmates.RefertoreadingmaterialsGroupactivities.Workwithyourgroupmembersandreadtheaboveinformationagainandtryyourbesttosolvethefollowingproblems.Pleasewritedownthefunctionofthedrillingmachineheadthearm.RefertoreadingmaterialsReadtheaboveunderlinedmaterialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.Firsttranslatethefollowingsentencesaboutthefunctionoftoolswithyourcooperators.RefertoreadingmaterialsReadtheaboveunderlinedmaterialsagainwithyourworkmatesandthentrytotranslatethemintoChinese,andfinallydiscusswithyourworkmates.WorkwithyourclassmatestryingtotranslatethefollowingphrasesintoChinese.TheradialdrillingmachineThedrillingmachineheadaheavyradialarmraisedorloweredwithpowermovesbackandforthmovementofthearm,drillhead,andspindleSurveyyourworkplaceandobservecarefully,andthenaskthemasterforhelpifanyproblems,writedownyourexperiencesinyourworkplace.RefertoreadingmaterialsSpindlefeedsandspeedsarecontrolledbyselectorleverswhichengagethepropergearsinthedrillhead.Depthoffeedisalsocontrolleddirectlyinthedrillheadbyasuitablemechanism.Inadditiontodrills,othertoolssuchasreamersandboringheadscanalsobeused,thesetoolsaddagreatdealofversatilitytothismachine.WorkwithyourclassmatestryingtotranslatethefollowingphrasesintoEnglish.进给量和转速选速手柄主轴箱齿轮进给深度适当的机构钻头刀具绞刀镗头Discussionwithyourcolleaguesandtrytosharetheideasofyourpartnersandthenmakesurewhichofthefollowingexpressionisrightorwrong.RightforTandwrongforFQuizQuestions.TickthecorrectresponseintherelevantboxTaskOne:Readthroughtheaboveinformationagainwithyourworkmatesandtrytofillintheblanksinthefollowingshortpassage.RefertoreadingmaterialsSurveyyourworkplaceandobservecarefully,makeoutt