英文關鍵字
wheel
ground
excavator
mover
mining
machinery
machine
loader
scoop
shovel
industry
industrial
heavy
road
power
equipment
tractor
transport
vehicle
construction
bulldozer
build
work
big
soil
tire
site
sand
yellow
activity
diesel
dig
outdoor
outdoors
backhoe
hydraulic
land
dirt
earth
steel
blue
technology
excavation
dirty
transportation
metal
contractor
large
bucket