发布时间:2025-02-08 11:12:10
(外径-壁厚)*壁厚*0.0246615=每米理论重量
326*6 每米理论重量 47.2
老房子刷乳胶漆多久可以住人 老房子刷乳胶漆后需要等多久才能入住
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