Double safety unit prevents screw tap from wearing out.
二重安全离合器装置能防止丝攻之折损。
At present, screwdriver and screw tap are hardware which is often used in machining factory.
目前，在机械加工工厂里，螺钉旋具和丝锥是较为常用的两种五金工具。
My tap is dripping, I can't screw it tight.
我家水龙头漏水了，我拧不紧了。
My tap is dripping, I can't screw it tight.
我家水龙头漏水了，我拧不紧了。
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