包邮机械工程专业英语

unitl
　text 1: heat treatment of steel
　reading 1: metal forming processes
unit2
　text 2 : welding
　reading 2 : cracking and fracture in welds
　　　　　　　　　　　　　　　　　　
unit3
　text 3: cutting angles
　reading 3: classification of machine tools
unit4
　text 4 : lathes
　reading 4: accessories of lathes
unit5
　 text 5: nc machine tools
　 reading 5: manual programming methods
unit6
　 text 6 : balancing
　 reading 6: fatigue strength
unit7
　  text 7: gears
　  reading 7: simple gear trains
unit8
　  text 8: lubrication of bearings
　  reading 8: lubrication systems
unit9
　  text 9: rationale for cad/cam
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