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钢筋一米多重_家居日记
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钢筋一米多重

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钢筋一米多重 钢筋的重量与其直径有关，计算公式为，重量M=系数0.00617×钢筋直径d×钢筋直径。直径为8mm的钢筋，重量M=0.395kg。直径为9mm的钢


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