英文關鍵字
black
building
coal
coalmine
coalminer
colliery
dirty
energy
fossil
fuel
hand
head
industrial
industry
lump
mine
miner
minerals
miners
mining
old
pit
power
source
stone
strike
transport
vintage
worker
works
yorkshire
英文關鍵字
black
building
coal
coalmine
coalminer
colliery
dirty
energy
fossil
fuel
hand
head
industrial
industry
lump
mine
miner
minerals
miners
mining
old
pit
power
source
stone
strike
transport
vintage
worker
works
yorkshire