英文關鍵字
coal
piece
fuel
snow
winter
bucket
resources
power
fossil
storage
extract
station
heaps
material
man
shovel
stone
industry
metallurgical
lignite
shine
calorific
natural
mining
energy
dirty
heating
anthracite
heat
solid
cold
black
lump
lumps
英文關鍵字
coal
piece
fuel
snow
winter
bucket
resources
power
fossil
storage
extract
station
heaps
material
man
shovel
stone
industry
metallurgical
lignite
shine
calorific
natural
mining
energy
dirty
heating
anthracite
heat
solid
cold
black
lump
lumps