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portland cement英英字典_portland cement剑桥英语解释_portland cement柯林斯英文解释_歐米惠必应词典
歐米惠必应词典

portland cement

P 开头单词

柯林斯词典

    Portland cement

  • 1. N a cement that hardens under water and is made by heating a slurry of clay and crushed chalk or limestone to clinker in a kiln 波特蘭水泥

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