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。

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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。

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