发布时间:2025-02-07 12:46:15
家具城壹期二楼工艺品区伍拾伍号 品味画框家生产圆角框
请问假设配合比是 c30 水泥245 矿粉70 粉煤灰50 水180 等求水灰比时是否要将矿粉和粉煤加进去
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