through coal的意思|示意

---

through coal相关短语

1、 gas diffusion through coal particles 煤粒瓦斯扩散

2、 through coal seam 施工

3、 cutting through coal 揭煤

4、 cut through coal seam 揭煤

5、 cutting through coal seam 揭煤

6、 methane diffusion through coal particles 煤粒瓦斯扩散

7、 straight-through pulverized coal burner 直流煤粉燃烧器

8、 Coal Gas Through 管道煤气

9、 tunnel through the coal seam 穿煤隧道