carbonaceous shale
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美
- 碳质页岩
双语例句
- Thin layers of sandy shale, and carbonaceous fragments are locally present.
局部出现砂质页岩薄层和碳质碎屑。 - In the stone coal layer and the overlying black shale, there is a pyrite layer.
在石煤层或其上部的碳质页岩中含黄铁矿层。
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