英文關鍵字
activity
bucket
building
bulldozer
cleaning
clearing
construction
correction
dig
digger
dirt
dozer
dust
earth
earthworks
engineering
environment
equipment
excavation
excavator
field
gravel
ground
heavy
hydraulic
industrial
industry
land
large
loader
machine
machinery
metal
mine
mining
mover
outdoor
power
quarry
road
sand
site
soil
summer
terrain
tractor
vehicle
wheel
work
yellow