亚州精品人妻一二三区_一区二区三区高清视频精品_国产在线一区二区_亚洲欧美精品中文字幕一区_久久久久久久亚洲高清av

  Fixed cold saw, or metal cold saw, is the abbreviation of sawing process of metal circular saw. In the process of metal sawing, the heat generated when saw blade saws the workpiece is transferred to the sawdust through the sawtooth, and the workpiece and saw blade are kept cool, so it is called cold sawing.