英文關鍵字
action
activity
angle
backhoe
blade
bucket
building
bulldozer
civil
clay
concept
construction
crawler
dig
digger
ditch
down
drag
dredger
dredging
dust
dusty
earth
engineering
excavate
excavating
excavation
excavator
ground
hole
hydraulic
industrial
industry
inside
low
machine
machinery
metal
operate
pickup
pit
power
pull
scoop
site
soil
tractor
trench
vehicle
view
work