The drilling machine is the second oldest machine tool, having been invented shortly after the lathe, and is one of the most comom and useful machines.
钻床是第二代机床，被发明在车床之后，并且是多数常见和有用的机器之一。
As a "machine tool", the laser beam has been found useful in cutting, drilling, and welding metals.
激光束作为一种“工作母机”，在切割、钻空和焊接金属方面已发现是非常有用的。
As a "machine tool", the laser beam has been found useful in cutting, drilling, and welding metals.
激光束作为一种“工作母机”，在切割、钻空和焊接金属方面已发现是非常有用的。
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