機器
asphalt
break
broken
build
building
cement
concrete
construction
contractor
crane
crash
day
destroy
development
dig
dirt
drill
drilling
engineering
equipment
excavation
excavator
ground
hammer
heavy
hydraulic
industry
iron
jack
jackhammer
job
maintenance
metal
nobody
pile
power
quarry
rebuilding
reinforced
repair
repairing
road
site
street
tool
work
yellow