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用普通锉刀加工紫铜、铝等软材料时,往往会因锉刀积屑而破坏工件表面,使锉刀失去锉削能力。为了适应铜件和铝件的加工需要,
With ordinary file processing copper, aluminum and other soft materials, often due to the file chip debris and destroy the workpiece surface, the file loses filing ability. In order to meet the copper and aluminum parts processing needs,