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Double screw thread

(16) | 06/08/2020 | Translate:

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A screw with double opposite thread, where the nuts can be moved clockwise and counterclockwise.

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1 Comment

Zak says:
01/12/2021 at 22:48

J’aimerai bien si tu nous expliques le phénomene , I am an engineer in G.m is g not understood the thing
cordially
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