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Used as cement admixture it can improve the soundness of cement and reduce the cost.
可以改善水泥的安定性,并能降低水泥的成本.
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Limestone often contains small amount of magnesium oxide that is harmful to soundness of cement.
石灰石中经常含有少量的氧化镁,这对水泥的安定性有害.
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