Incoherent Low-ash Coal

low-ash-fusing-point coal

high-low-low temperature

high-low-low temperature process

LLWL (low-low water level)

low ash combustion

low coal bed

low coal group

Low Coal Rank

Low-ash

low-ash fuel

Low-coal

Low-low satellite to satellite tracking mode

Low-Low Satellite-to-Satellite Tracking

low-low water level switch

mean low low water

Medium-Low-Low Temperature

mid low low temperature shift

mid low low temperature shift process