機器
activity
aerial
arm
backhoe
bucket
build
building
bulldozer
business
construction
development
dig
digger
dirt
earth
engineering
equipment
excavation
excavator
ground
heavy
hydraulic
industrial
industry
large
lift
loader
machinery
mechanism
metal
mine
mover
pit
power
quarry
raise
repair
sand
scoop
shovel
site
sky
soil
technology
tractor
transport
transportation
vehicle
work