@thetruequantum: Corrugated plastic pipes are formed by shaping hot plastic in moving molds, then cooling it to preserve the ridges that allow flexibility. The second clip shows a knot inside a plug intended to reduce strain on the connections when the cord is pulled. Credits: @qiangsheng_machine @simpletips_life #Engineering #Manufacturing #Electricity #Technology #HowItsMade

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SHALBY :

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ZEEM :

the first one

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Profile :

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