機器
backhoe
banner
blue collar
blue sky
bulldozer
caterpillar
civil engineering
construction
contractor
copy space
crane
deforestation
demolition
development
dig
digger
dirty
earth moving
earthworks
economy
employment
environment
equipment
excavating
excavation
excavator
foundation
global warming
ground
groundworks
heavy
hill slope
hydraullic
industralization
industrial
industry
job
loader
quarry
road works
site
soil
tower crane
used
vehicle
work