機器
activity
bulldozer
car
construction
construction site
development
digger
digging
dirt
dredging
dump
dumper truck
earth
engineering
equipment
excavation
excavator
exploitation
extracting
heavy
highway construction
huge
if you
industrial
industry
loading
machinery
mine
mineral
mining
pit
play
removing
road
sand
toy
tractor
transport
truck
trucks
vehicle
work
worker
workplace
yellow