機器
action
activity
blade
building site
bulldozer
business
busy
caterpillar
close up
construct
construction
contractor
detail
diesel
dirt
dirty
dust
duty
earth
earthmover
earthmoving
equipment
excavator
ground
heavy
industrial
industry
iron
land
loader
machinery
metal
move
movement
mover
power
powerful
push
site
soil
steel
tool
track
transport
transportation
vehicle
work
yellow