coal recovery rate meaning in Chinese

煤炭回采率

Preliminary discussion on the way to raise coal recovery rate during fully mechanized caving mining
浅谈提高综采放顶煤回收率的途径
The approach of improving the coal recovery rate of comprehensive mining caving coal in severe inclined think coal seam
提高综采放顶煤开采急倾斜特厚煤层回采率的途径
Study and test for recovery rate of the top coal in fully mechanized face using caving method and the methods for raising the coal recovery rate
综放面顶煤回收率试验研究及提高回采率的途径