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Tubes de papier d'emballage de poudre | Boîte de tube de papier écologique | Boîte de cylindre en carton
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Amazon.fr - The Tab Guide to Vacuum Tube Audio: Understanding And Building Tube Amps (Tab Electronics) - Whitaker, Jerry - Livres
Outer diameter of a metallic tube is 14cm and thickness of the cube is 1cm. Find the weight of 2m long tube,If the density of the metal is 7gm/cm³
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