機器
activity
big
bulldozer
construction
crushed stone
development
dig
dirty
drive
driving
dump
dust
engineering
equipment
excavation
excavator
gravel
heavy
industrial
industry
iron
large
loader
loading
machinery
metal
mine
mineral
mining
opencast
ore
power
production
quarry
road
roadwork
rock
rocks
shoveling
site
sky
stone
technology
tractor
transport
transportation
vehicle
wheel
work