... 石碴混凝土 ballast concrete 石碴坝 rock debris dam 密实石碴混凝土 dense ballast concrete ...
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Sandstone, mudstone and limestone rock-debris have a very wide distribution and are very frequently used as dam materials in Sichuan Provi- nce.
砂岩、泥岩和灰岩石碴料是四川省分布广，使用最多的几种坝料。
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