常見(jiàn)例句雙語(yǔ)例句Sandstone, mudstone and limestone rock-debris have a very wide distribution and are very frequently used as dam materials in Sichuan Provi- nce.砂巖、泥巖和灰?guī)r石碴料是四川省分布廣，使用最多的幾種壩料。 返回 rock debris dam