ile:磨工.mpg file:1手工造型(一.mpg file:1铣床介绍及其操作.DAT file:3钳工 划线.DAT file:2轴盘类零件车削.mp4 file:1车床基本操作.mp4 file:3特型表面车削加工.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数控车床加工工艺.mpg file:2气焊气割及其他焊接方法.DAT