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5か月前I think its more likely an impact driver. They are much more common than hammer drills. Ironically more inappropriate for any drilling.


I think its more likely an impact driver. They are much more common than hammer drills. Ironically more inappropriate for any drilling.
I seem to remember wedge was basically an inclined plane, and a screw was an inclined plane wrapped around an axle. Also a pulley is a specific application of wheel and axle.