residual coal的意思|示意

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residual coal相关短语

1、 residual coal pillar 残留煤柱

2、 residual coal mining 残煤开采

3、 Residual coal in goaf 采空区遗煤

4、 lifter for residual coal 余煤提升机

5、 recovery unit for residual coal 残煤回收装置

6、 Recovery of residual coal-column 回收残留煤柱

7、 coal-residual coprocessing 煤油共处理

8、 weathered coal residual 风化煤渣