In north China, the late Paleozoic coal was metamorphosed mainly to middle and high ranking in the central and southern belts, but only to low, ranking in the northern belt and southern margin.

华北晚古生代煤具有中部和南部变质程度较高而南部边缘和北部低的特点。

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Restore and improve the structure state of middle-and-high-ranking consumers of water body, may be the only way to resume and improve above-mentioned bad states.

只有恢复和改善水体中高级消费者的结构状况，才有可能恢复和改善上述不良状况。

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The company has a mature and a pioneering spirit of the management and technical team, including 15 senior titles, 93 intermediate grade, middle and high-ranking technician with 60 people.

公司拥有一支成熟而具有开拓精神的管理和技术队伍，其中高级职称15人，中级职称93人，拥有高中级技师60人。

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