发布时间:2025-01-16 10:49:41
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
我家的房屋想把中间的承重墙打通 应该怎么办求好心懂的人提提意见
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