file:刨工.mpg file:2手工造型二与机器造型.mpg file:2数控线切割手工编程.DAT file:1数控电火花线切割的基本知识与机床.DAT file:2铣床附件及齿型加工.DAT file:3数控车床编程基础.mpg file:3钳工 划线.DAT file:2气焊气割及其他焊接方法.DAT file:3特型表面车削加工.mpg file:2轴盘类零件车削.mp4 file:1车床基本操作.mp4