機器
activity
backhoe
bucket
building
bulldozer
construction
construction site
crawler
dig
digger
dipper
engineering
equipment
excavation
excavator
group
heavy
hydraulic
industrial
industry
job
large
loader
loading
machinery
mechanic
mechanism
metal
mover
moving
outdoor
power
powerful
ready
row
scoop
shovel
shoveling
site
sky
technique
technology
tractor
transport
transportation
vehicle
work
worker
yellow