... centring wedge 定中心楔 centring chuck 定中心夹头 centring spool 对中套筒 ...
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self-centring chuck 自动定心卡盘
The use of the tapping chuck is particularly advantageous when working with the quick change system on drilling machines that allows to drill and tap in the same position without centring again.
另一优势的体现在这种快换的装置允许在同一个位置上钻孔或者是攻丝，不需要再做中心的调整。
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