機器
action
activity
asphalt
bucket
bulldozer
development
digger
dirt
earth
engineering
equipment
ground
hard
heap
heavy
highway
hydraulic
industrial
industry
job
land
landscape
large
loader
material
metal
mountain
mover
operator
pipe
power
repair
rock
sand
shovel
site
stone
street
structure
technology
tool
track
tractor
transport
truck
vehicle
way
work
yellow