Handbook of Machine Design P12

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Handbook of Machine Design P12

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Not only must tools, equipment, and machines function, but in many cases their effectiveness depends on how well a human can use and operate them. A pair of pliers is useless unless it is held in the human hand; a lathe (if not run automatically) needs an operator to observe the cutting edge, to operate controls, and to feed and unload; maintenance and repair of equipment must be facilitated by proper design.

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