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【Daily Question No. 123】December 31, 2018

2018-12-31View Original

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【Daily Question No. 123】December 31, 2018: Internal and external threads can be screwed together only when their five essential elements ( ) are met. Fill in the blank: same
Reply #22018-12-31
The tooth shape, diameter, pitch, number of threads, and rotation direction are all the same

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