MachineElements,Unit2,机械零件,TestingBeforeClass:,Whatdoes“clutch”mean(radio)?,MachineElements,Couplings,CrankshaftsandConnectingrods,MachineTool,Clutch,Bearings,MachineElements,Howeversimple,anymachineisacombinationofindividualcomponentsgenerallyreferredtoasmachineelementsorparts.Thus,ifamachineiscompletelydismantled,acollectionofsimplepartsremainssuchasnuts,bolts,springsgears,camsandshaftsthebuildingblockofallmachinery1.Amachineelementis,therefore,asingleunitdesignedtoperformaspecificfunction