英文關鍵字
aerial
bucket
building
bulldozer
cobblestone
construction
crashed
dig
digger
dirt
drone
dump
dumper
earth
earthmover
equipment
excavation
excavator
grader
ground
heavy
hydraulic
industrial
industry
ladle
load
loader
loading
machine
machinery
mine
mineral
mining
mover
pit
quarry
sand
site
soil
stone
top
tractor
transport
transportation
truck
unloading
vehicle
view
work
working