機器
barren
boulder
brown
bulldozer
carbon
cast
chiming
chimney
cliff
coal
copper
country
crag
cultivator
cut
engine
exploit
exploitation
explore
extract
fabric
factory
finery
flue
funnel
furnace
iron
ironworks
manufacture
metal
mill
mine
pit
plant
rock
rubbish
sand
scar
smelter
smelting
smoke
soil
stack
tailings
tractor
transportation
tunnel
works
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