英文關鍵字
road
heavy
quarry
equipment
machine
soil
mover
earth
work
industry
bulldozer
building
engine
hydraulic
track
excavation
loader
load
large
dig
view
construction
land
excavate
excavating
transport
mine
coal
development
transportation
excavator
machinery
fuel
harvesting
yellow
field
power
sand
dirt
truck
vehicle
job
ground
gravel
site
industrial
tractor