機器
arm
background
backhoe
black
bucket
build
bulldozer
cable
claw
construction
cylinder
detail
dig
digger
dozer
engineering
equipment
excavate
excavation
excavator
heavy
hose
hydraulic
industrial
industry
iron
loader
machinery
mechanical
metal
pipes
power
powerful
pressure
shovel
site
steel
technology
tool
tractor
vehicle
work
yellow