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1. The characteristics and mixture ratio design of the polypropylene fiber shotcrete are introduced.
   摘要介绍了聚丙烯纤维喷射混凝土的特点及其配合比设计。
2. The mixing proportion of frest water concrete can be used for preparing seawater concrete.
   海水拌和的混凝土配合比可以采用淡水混凝土的配合比。