A pointed and threaded tool for drilling and boring that is secured in a brace, bitstock, or drill press.
通常是尖头
有螺旋
并且可以更换，用在
柱柄或床上。
)柄A pointed and threaded tool for drilling and boring that is secured in a brace, bitstock, or drill press.
通常是尖头有螺旋并且可以更换，用在柱柄或床上。
the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press .
割部分；通常是尖头有螺旋并且可以更换，用在柱柄或床上。
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