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30*30*2方管一米多重_家居日记
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30*30*2方管一米多重

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30*30*2方管一米多重 30×30×2方管每米重大约1.76kg。大家可根据公式计算：方管1米重量=4×壁厚×（边长-壁厚）×7.85，30×30×2的方管


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