How to drill a triangular hole? - Rong Mama talks about industrial science and mechanical structure

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Why not turn off the water when repairing a pipe? This is called pressure plugging. #Science #Unzip

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I mean whoever invented this is amazing, it's really eye-opening.

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Wear women's clothes once, and you will know how many perverts there are abroad

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I admire the working people

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Introduction to Traditional Group Farming Culture in Africa

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The reflection affects the time a bit

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How sexy is sexy lingerie?

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