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一为了延长刀具的寿命,涂层在镶片式刀具上早已使用,现在扩大到其他刀具上,齿轮滚刀就是一个突出的例子一
In order to extend the life of the tool, the coating has been used in the insert tool, now expanded to other tools, the gear hob is a prominent example of a