機器
align
background
blade
brown
building
bulldozer
construction
destroyed
dirt
dust
earth
engineering
equipment
excavator
exploitation
extract
grader
gravel
ground
heavy
hydraulic
industrial
industry
land
machinery
metal
miner
moving
natural
opencast
power
progress
quarry
recovery
road
roadworks
selling
site
soil
supply
technology
trace
tractor
truck
vehicle
work
worker
yellow