機器
bentonite
bulldozer
construction
copper
crusher
curve
cut
deep
development
dig
digging
dirt
dump
earth
environment
environmental
equipment
excavate
excavation
excavator
exploitation
extracting
freight
geology
ground
heavy
hole
industrial
industry
kaolin
large
machinery
metal
mine
mineral
mining
open
pit
pollution
quarry
resource
rock
shoveling
site
stone
surface
technology
transportation
truck