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如图1所示,为一种新型台阶钻头。这种钻头特别适宜于在厚度不超过4mm的各种金属、塑料、电木板等薄板材料上进行钻孔、扩孔等作业。
Shown in Figure 1, as a new type of step drill. This drill bit is particularly suitable for drilling, reaming and other operations on sheet metal, plastic, bakelite and other sheet metal with a thickness of no more than 4mm.