The utility model relates to a hole enlarging drill bushing, which belongs to a processing knife tool.
本实用新型是一种扩孔钻套，属于加工刀具。
It is not fastened to the machine on which it is used and may be moved around on the table of the drilling machine to bring each bushing directly under the drill.
它不固定在使用它的钻床上，它能在钻床工作台上到处移动以使每个衬套都直接位于钻头下。
It is not fastened to the machine on which it is used and may be moved around on the table of the drilling machine to bring each bushing directly under the drill.
它不固定在使用它的钻床上，它能在钻床工作台上到处移动以使每个衬套都直接位于钻头下。
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