... iron clay shale 含铁粘土质页岩 clay shale with low permeability 低渗透页岩 shale clay 页岩粘土 ...
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Hanyin shale clay 汉阴页岩陶土
clay shale 粘土页岩 ; 泥页岩 ; 黏土页岩 ; 泥岩
Expanded clay and shale 膨胀粘土和页岩 ; 膨胀粘土和页石
clay of shale 页岩泥
Burnt Clay and Shale Bricks 烧制的粘土及页岩砖
clay shale with low permeability 低渗透页岩
iron clay shale 含铁粘土质页岩
clay shale formation 粘土页岩建造
Coal deposits, after all, are petrified peat swamps, and peat is made from decaying plants, which leave their imprints in mud and clay as it hardens into shale stone.
毕竟煤炭矿床本身就是石化的泥炭沼泽，而泥炭的成份是腐烂的植物。当粘土泥浆逐渐硬化成页岩石，腐烂的植物则在上面留下了它们的印记。
Company production brick machine products are applicable to shale, gangue, coal ash, clay as material of brick making users.
公司生产的砖机产品适用于以页岩，煤矸石，粉煤灰，粘土等为原料的制砖用户。
The leaves of ferns, reeds, and other plants, are frequently found between layers of shale or slaty clay, beautifully perfect, but converted into coal.
我们通常能在页岩层和黏板岩层中发现蕨类植物，芦苇和其它植物的叶子，但是这些叶子都完全转变为了煤。
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