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安全攻丝夹头用在钻床或镗床上,套筒3浮动安装在夹头体4的孔里,并被弹簧2拉住,套筒上安装了键1并设有固定丝锥的方
Safety tapping chucks used in drilling or boring machine, the sleeve 3 floating mounted in the chuck body 4 hole, and pulled by the spring 2, the sleeve is installed on the key 1 and a fixed tap side