I was lucky to have a drill press and vee-block on hand, but they are not strictly necessary.
我很幸运，有一个钻床及牧畜手头块，但他们不是绝对必要的。
Molding ways of the drill bit comprise one-step forming and mosaic block type two-step forming.
钻头成型方式包括一次成型和镶块式二次成型。
Molding ways of the drill bit comprise one-step forming and mosaic block type two-step forming.
钻头成型方式包括一次成型和镶块式二次成型。
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