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To: SamAdams76

A screw / bolt is a simple machine comprised of an inclined plane rotated about an axis. It has existed for thousands of years in some form or fashion. We’ve just improved on the basic idea through standardization and better materials.

17 posted on 04/28/2018 10:34:44 PM PDT by unlearner (A war is coming.)

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To: unlearner

"We’ve just improved on the basic idea through standardization and better materials."

Have we?

20 posted on 04/28/2018 11:02:54 PM PDT by who_would_fardels_bear

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