機器
activity
aggregate
belt
breaker
construction
conveyor
crusher
crushing
dig
digger
earth
engineering
environment
equipment
excavation
extraction
factory
gravel
heavy
industrial
industry
job
landscape
large
load
loader
machinery
material
mill
mine
mineral
mining
mobile
occupation
plant
power
quarry
road
rock
sand
site
stone
technology
toil
transportation
vehicle
work