What is liquid nitrogen cold fitting? Freezing metal parts lets them slide in perfectly snugly.

Animation simulates the bodily changes that occur during pregnancy

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When You Pick Up a Shell Casings by the Roadside

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Harmonic Drive Reducer

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Handmade|16 small inventions

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Lathe Burnishing Tool

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A man's speed bump

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It’s frozen—what’s the science behind this?

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A human specimen is sliced from foot to head, cut into nearly 100 thin sections.

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Super cool mechanical series of speed bumps!

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The Years I Spent as a Soldier in the Factory 1

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Speed bump!! Amazing machinery~

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I made an electric wheelchair for my grandma.

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20 common mechanical transmission structures, I'm exhausted

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Speed Bump!! Cool Mechanical Series 6.17

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Liebherr Excavator R9800

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Coconut production line

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Take you on a tour of the factory assembly line.

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The stress-relieving workplace at a speed bump installation site~

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Unboxing video!! The irresistible charm of machinery

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The uncle is not simple at first glance, and I was shocked when I saw the finished product! #糖画手艺

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