what kind of joints allows you to turn a screw loose or tight with a screwdriver
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A screw is a mechanism that converts rotational motion to linear motion, and a torque ... In screw mechanisms, either the screw shaft can rotate through a threaded hole ... for a right-handed person, tightening a right-handed screw with a screwdriver is ... screws, and where the joint must be fluid tight as in threaded pipe joints.
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