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A piece of wire is wound on the pencil for 20 turns, and the width of 20 turns is 20 mm measured with a scale. The diameter of the wire is? Mm
I'm in a hurry
A piece of wire is wound on the pencil for 20 turns, and the width of 20 turns is 20 mm measured with a scale. The diameter of the wire is? Mm
I'm in a hurry
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