Through analysis on coal formation and system, expound the change regulation of Boli coal field.

通过对含煤建造及构造体系的分析，探讨了勃利煤田的变质规律。

youdao

Through analysis on coal formation and system, expound the change regulation of Boli coal field.

通过对含煤建造及构造体系的分析，探讨了勃利煤田的变质规律。

youdao