- Study on efficient unmanned coal planer working platform mining technique
- Keywords Thin coal seam face;Coal planer plough system;Key technology;
- Analysis on the Principle of Making Complete Sets of Equipment on the Working Faces of the Coal Planer and Its Practicability in the Low Coal Seams
- We need to replenish our stocks of coal.
- She piled on more coal before the fire go out.
- I add the coal on the flame continuously.
coalless coal coal - transportation trestle coal conversion to oil projects coal mining upon confined water coal-derived gas accumulation coal dressing with heavy medium Coal-miners are a tough breed coal-tar pitch derived carbon coal bed spontaneous combustion coal briquette for gasification coal conveying transfer station