该钻头是在钻体的下端焊接着有一定耐磨性合金包镶金刚石的钻齿，上端焊接着钻柄。
The diamond drilling teeth covered with antiwear alloy are welded to the lower end of drilling body and a triangular drilling shank is welded to the upper end.
该钻头是在钻体的下端焊接着有一定耐磨性合金包镶金刚石的钻齿，上端焊接着钻柄。
The diamond drilling teeth covered with antiwear alloy are welded to the lower end of drilling body and a triangular drilling shank is welded to the upper end.
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