英文關鍵字
activity
big
bucket
build
building
bulldozer
construct
construction
contractor
dig
dirt
dredge
earth
earthmover
equipment
excavation
excavator
flatten
heap
heavy
hydraulic
industrial
industry
job
labor
loader
machine
machinery
move
mover
operate
operator
outdoors
power
push
sand
scoop
shovel
site
sky
soil
sunset
track
tractor
transport
vehicle
wheel
window
work
yellow