The impact of heavy metal oxides, such as ZnO, PbO and CuO, on the setting time and mechanical properties of cement pastes was investigated.
英
美
研究了缓凝剂、速凝剂单掺以及与其它品种外加剂复配掺入时 ,对水泥凝结与硬化性能的影响。
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英 汉