这款抓手用于旋转铸块，从水平旋转到垂直方向或从垂直旋转到水平方向，是自动的锁紧机械。
This tong is used to rotate ingots from the horizontal to vertical or vertical to horizontal positions and utilizes an automatic latching mechanism.
自攻螺丝的螺纹会在孔内切割出内螺纹孔，然后锁紧两块铁板。
These screws have threads that cut the hole and are made to fasten metal to metal.
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