What kind of wisdom did the ancients have to design such a sophisticated mechanism?

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【80s Biaozi】Video loading... Quickly check out the surprise!

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The working people are so clever!

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It's so convenient in the countryside—you can just chop down a bamboo on the mountain and whip up a

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The old man lost money raising mandarin fish this year, but he never thought that there were so many

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It is China's hammer that bears all the responsibility.

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How much money would you give me for such a dangerous job?

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Super Cool! Super Easy! Super Impressing! Learn It in 5 Minutes

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Starting with just an iron chain, relying entirely on pulling throughout the whole process #Log Grap

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A lock with hidden secrets

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Thanks, master, you really have a wild imagination! It's better to have a clever mind than just brut

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Amazing tool, so creative

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Gear latch process principle

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You've never seen friction welding so perfect

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Hilarious finger creative painting, fingertips draw a little life!

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