More ammonium sulphate solution is being recovered in the process of distilling oil shale.
在提炼油页的程中回收的硫酸铵液多了。
More ammonium sulphate solution is being recovered in the process of distilling oil shale.
在提炼油页的程中回收的硫酸铵液多了。
Resinite is a rich n1aceral in Teriary humic coal,boghead-cannel coal and oil shale fromHuangxian Coalfield.
黄县煤田第三腐殖煤、藻烛煤、油页组分富含树脂体。
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