煤层变薄 meaning in English
balk
bed thinning
Examples
- A simple analysis of formation of coal pinching zone in no . 7501 working face
7501工作面煤层变薄带的成因浅析 - Analysis on formation mechanism of seam getting thinner zone in xiandewang mine field of xingtai mining area
邢台矿区显德汪井田煤层变薄带的形成机理分析