機器
backhoe
bucket
build
bulldozer
compactor
construction
destruction
digger
digging
dirt
duty
elevation
engineering
environment
equipment
excavation
excavator
exploitation
heavy
hydraulic
industrial
industry
job
lifter
loader
machinery
manufacture
mechanical
mud
operator
power
rugged
scraper
shovel
site
soil
tractor
transport
trench
trucks
urban
vehicle
wheels
work
workers
zone