MECH1_tch_Dynamics_Thermodynamics_Material[10-31]
 MECH2_tch_机械设计Design20111030[10-31]
 MECH3_tch_机械制造manufacturing20111030[10-31]
 MECH4_tch_机械工程师Engineer20111030[10-31]
 MECH5_tch_课程项目设计course item design[10-31]
 引言[10-31]