"We have built a small all-iron warship, which will not sink, but.." Wang Kan was embarrassed and seemed to be helpless: "Even in the state of full sail, he ran very slowly." The iron washbasin is placed in the water, because its overall structure will not sink. If the ship is made of metal, as long as the hull design is reasonable, there is no reason that the ship will sink because it is made...
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