機器
activity
agriculture
background
backhoe
big
black
building
bulldozer
chain
construction
crawler
detail
dirt
drive
earth
equipment
excavation
excavator
gear
gravel
ground
heavy
industrial
industry
iron
large
machinery
metal
mover
old
outdoors
power
shovel
site
soil
steel
technology
track
tracks
tractor
transportation
truck
vehicle
wheel
work