機器
alpine
building
building lot
building site
bulldozer
construction
construction equipment
crawler
destroy
diesel
digging
dirt
dirty
earth
enlarging
equipment
excavator
gravel
ground
hammer
heavy
hydraulic
impact
landscape
machinery
metal
mountain
power
road
roadwork
rock
route
scraper
serpentine
site
stone
strength
track
tracked
tractor
unsurfaced
vehicle
vibro
way
work
worker
works
yellow