preparatory cutting的意思|示意

The cutting tools, machine tools, machining technology and other aspects involved in the key technology of dry machining and preparatory dry machining are presented in the paper.

对干切削或准干切削的关键技术所涉及的刀具、机床、加工工艺及其它因素等几个方面进行了介绍。

Because the concrete cutting blasting work, it is difficult to avoid flying out or some other safety accidents, therefore, it is necessary to ensure the safety of preparatory work.

由于混凝土切割爆破工作中，很难避免有飞石蹦出或者一些其他安全事故的发生，因此，做好安全准备工作是必要的。