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A submarine propeller will begin life as a greater than half dozen meter (20 foot) width, 50,000 kilogram (55 ton) metal casting. Babyliss Australia Big Hair It ought to be machined down to a mass close to 37,000 kilograms (Forty-one tons) in its final type. Current machining methods leave the propeller with a rough surface, which if left unrevised, would betray a submarine exercises in the ocean. So, a few months of hand finishing are important.
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