機器
black
blue sky
commodity
concrete
construction
conveyor belt
dirty
dust
energy
geology
global warming
gravel
gray
grey
heaps
heavy
industrial
industrialization
industry
machinery
material
mine
mining
moving
natural
ore
piles
platinum
platinum ore
pollution
pollution industry
processing
raw materials
refining
rock
rough
sand
silo
site
sorting
steel
stone
stones
storage
texture
transportation
transporting
transporting ore
work