煤层
Coal
seam
Coalbed
coal seam
mining
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三软中厚煤层
three soft in the thick coal seam
中硬厚煤层
medium-hard thick seam
11-2煤层
11-2 Coal Seam
20m特厚煤层
20m very thick seam
20m特厚中硬煤层
20 m VERY THICK AND MEDIUM HARD SEAM
2号煤层
the 2nd Coal Seam
3(#)煤层
3(#) coal
B4煤层
B4 coal-bed
B煤层
B coal seam
CO2-N2赋存煤层
coal seam containing CO2 and N2
K1煤层
K1 coal seam
煤层
mining seam
变薄煤层
thin seam
变位煤层
displaced pool
薄基岩浅埋煤层
the shallow buried coal seam of thin base rock
煤层
thin coal seam
thin seam
thin seam working face
coal pipe
Girdle
thin film technique
think seam
Thin coal-bed
不可采煤层
unminable coal
unminable coalbed
unworkable seam
不稳定煤层
unstable coal seam
超厚煤层
extra-thick
超特厚煤层
Ultra-thick Coal Seam
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