機器
activity
backhoe
big
bucket
build
building
bulldozer
construction
development
dig
digger
digging
dirt
earth
engineering
equipment
excavate
excavation
excavator
ground
heavy
hydraulic
industrial
industry
large
loader
machinery
metal
mine
mining
mover
power
quarry
sand
scoop
shovel
site
sky
soil
technology
tractor
transport
transportation
truck
vehicle
wheel
work
working
yellow