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Because the tool bit and the tool bar are is fixed together by the tapering shape positioning device, the tool bit can be dismounted from the tool bar to make a multi-purpose tool bar.
由于刀头和刀杆是用锥式定位装置固定在一起的，所以刀头可以从刀杆上拆卸下来，使得一刀杆多用。
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