青云英语翻译
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Hequ, Shanxi province Taiyuan formation, small is the main minable coal thickness, coal quality data analysis, summarized the Taiyuan formation and occurrence regularity of coal, 11th, 13th and coal quality variation orderliness, and discusses the development of main seam construction and its influe
正在翻译,请等待...
正在翻译,请等待...
Hequ, Shanxi province Taiyuan formation, small is the main minable coal thickness, coal quality data analysis, summarized the Taiyuan formation and occurrence regularity of coal, 11th, 13th and coal quality variation orderliness, and discusses the development of main seam construction and its influe
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