主采煤层 meaning in English
main excavating coal seam
Examples
- Preliminary probe into spontaneous combustion mark gases on main - mining coal seam in pingdingshan coal industry group
平煤集团主采煤层的自然发火标志气体初探 - Characteristics of faults in main seams of laoyingshan mine and their influence upon arrangement of development and working faces
老鹰山矿主采煤层内断层的特征及其对采掘工作面布置的影响