英文關鍵字
activity
asphalt
bucket
building
car
cobblestone
construction
contractor
dig
dirt
dust
equipment
excavating
excavation
excavator
exploitation
gravel
ground
heavy
industrial
industry
ladle
load
loader
lorry
machine
machinery
mine
move
pebble
pebbles
power
quarry
road
sand
scoop
soil
sprinkle
stone
stones
technology
tractor
transport
truck
vehicle
wheel
wheels
work