发布时间:2025-01-31 23:29:57
石英石化学成分是二氧化硅(SiO2)半透明或不透明的晶体,含有杂质时颜色不一。方解石是一种碳酸钙矿物(CaCO3),敲击方解石可以得到很多方形碎块,故名方解石。
用于框架填充内墙的轻集料混凝土空心砌块和砌筑砂浆的强度等级不宜低于
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