发布时间:2025-01-29 10:36:13
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
我闺蜜非要买滨江郦城我担心她买到不好的有没有了解的人来说一下
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