发布时间:2025-02-04 04:43:02
1.42到1.46g/cm3。在粉煤灰加气混凝土砌块生产工艺及应用中,加气块粉煤灰磨浆1.42到1.46g/cm3比重合适。粉煤灰指飞灰。由燃料(主要是煤)燃烧过程中排出的微小灰粒。
公司购买的办公家具(办公桌、沙发)单位价值不超过两千该下哪个科目呢
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