The stone coal is a coal resource that reserves in old stratum.

石煤是贮藏在古老地层中的一种煤炭资源。

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Extracting V2O5 from stone coal is a important method to get vanadium.

从石煤中提取V2O5是获得钒的重要途径。

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There's a lot to be made from coal and building stone.

煤和建筑石材，可以卖很多钱。

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There's a lot to be made from coal and building stone.

煤和建筑石材，可以卖很多钱。

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