煤矸石是我国最大的工业固体废物源.Coal gangue is the largest source of industrial solid waste in China.煤矸石是采煤业选煤的尾矿.Coal waste is tailings of coal concentration of coal - winning industry.煤矸石喷射水泥主要用于喷射混凝土.The gangue jet cement is mainly ...
D . When specified , gaskets of other materials are available as an option.作为备选件, 如果用户要求, 也可提供其它材料的垫圈.Daphne was so guileless that Claire had no option but to believe her.达夫妮如此忠厚老实，克莱尔对她的话也只有信以为真了。The regime at Latchmere...