英文關鍵字
activity
backhoe
bucket
building
bulldozer
construction
debris
development
dig
digger
dirt
dredger
earth
earthworks
ecology
engineering
equipment
excavate
excavating
excavation
excavator
garbage
gravel
ground
heavy
hole
hydraulic
industrial
industry
land
loader
machine
machinery
mechanical
mine
mover
mud
pollution
power
sand
scoop
shovel
site
soil
tractor
trench
vehicle
work