英文關鍵字
action
activity
blade
bulldozer
caterpillar
closeup
construction
contractor
crawler
diesel
dig
digger
dirt
driving
dust
duty
earthmover
equipment
excavation
excavator
force
ground
heavy
industrial
industry
iron
land
machine
machinery
mechanical
mover
power
push
site
soil
technology
tool
track
transport
transportation
vehicle
wheel
work