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