发布时间:2025-01-31 13:38:20
指的是强度 MU10就是抗压强度标准值为10兆帕的砖,普通烧结砖基本的要求就是达到10兆帕以上,M5砂浆指的就是28天标养强度标准值为5兆帕的砂浆
singfun 先锋 dytss2 电热油汀 13片取暖神器
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