发射激光的原理就好像是工厂中汽车焊接一样，通过地面的望远镜发射激光，将地球附近的垃圾碎片推离开轨道。
Lasers similar to those used for welding in car factories would be fired through telescopes to 'nudge' piles of rubbish left in orbit.
WPS文件是工厂用来指导进行焊接生产的。
The WPS file is used to guide the welding production factory.
一般一个焊接制造厂会有非常多的WPQR和对应的WPS文件，文件要覆盖工厂所有的焊接工艺。
General a welding factory will have WPQR very much and the corresponding WPS file, the file must cover all welding factory.
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