機器
activity
bucket
builder
building
bulldozer
construction
contractor
development
diesel
dig
digger
dirt
dirty
earth
equipment
excavation
excavator
ground
heavy
hydraulic
industrial
industry
iron
job
large
loader
lorry
machinery
metal
mover
mud
outdoor
power
quarry
road
scoop
shovel
technology
tool
track
tractor
transport
transportation
truck
vehicle
wheel
work
worker
yellow