英文關鍵字
brown
bucket
builder
building
business
car
clay
closeup
communications
construction
deep
dig
digger
earth
engineering
equipment
excavate
excavating
excavation
excavator
geology
hard
heavy
hole
industrial
industry
large
loading
machine
machinery
metal
mine
pit
pov
road
rock
sand
scoop
shovel
site
sky
soil
stone
street
tractor
transport
vehicle
work
worker
yellow