发布时间:2025-01-16 10:43:09
钢材密度按7850千克/立方米计算,
方通重量为:
(0.2X0.2-0.18X0.18)X1X7850
=59.66千克/米
=59.66公斤/米
分包装修的资料员需要用准备资料开工报告是材料进场之前开还是之后开
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