機器
activity
architecture
backhoe
big
bucket
build
building
bulldozer
business
construction
dig
digger
dirt
dredger
dump
dust
duty
earth
equipment
excavate
excavation
excavator
gravel
heap
heavy
hydraulic
industrial
industry
job
loader
machinery
massive
mover
power
road
sand
scoop
shovel
site
sky
soil
sun
sunlight
tractor
transport
truck
vehicle
work
yellow