Why are train tracks always laid on a bed of stones, while high-speed rail tracks are kept so clean

Why is 194 dB the sound limit, and what happens if you exceed 194 dB?

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Typesetting project sharing (both are imitations)

133 Views

The Spirit of Craftsmanship

19 Views

The boss told us to take it apart. Feels like we’re doing it wrong, but whatever—let’s just keep tak

22 Views

The ultimate in automation

13 Views

Children's educational handmade toys building blocks roller coaster big shark ball game

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Children's educational handmade toys building blocks track roller coaster ball ice tyrannosaurus gam

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Children's educational handmade building blocks track toy rainbow pipe ball game

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Children's educational handmade toys colorful track ball game

23.6K Views

Installation Method for Double-Row Self-Aligning Ball Bearings

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Real vs. Fake Imported Bearings

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Full Assembly Process of ZF Spindle Assembly

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Electric Welding Tips and Tricks

71 Views

Machines Men Can't Resist

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High-speed rail transfer, the time is only 12 minutes, the handsome guy running at Guangzhou South S

51 Views

Human Speed Bump Tool

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What is it like to debug a set of trackballs that have gone crazy?

107 Views

Man's Speed Bump: Obsessive-compulsive Worker

333 Views

Imported Bearings

69 Views

No man can resist this kind of mechanical marvel.

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