... metal slitting saw 锯割刨刀 threads per inch 牙数 progressive blanking 持续下料加工 ...
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trapezium 是指梯形;TPI是指 threads per inch( 每英寸螺纹数);1英寸=2.54厘米;下战书帮你问一下学机械的同窗,这个应该是说的一个螺帽的尺寸。
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Henceforth someone trying to build an engine could pluck a standard 8-gauge, 32-threads-per-inch machine screw off the shelf.
FORBES: Architect of Life
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