英文關鍵字
aerial
blue
bucket
bulldozer
cobblestone
construction
crawler
dig
digger
digging
dirt
drone
dump
dumper
earth
earthmover
equipment
excavate
excavation
excavator
grader
heavy
industrial
industry
ladle
load
loader
loading
machine
machinery
move
mover
outdoors
pour
power
quarry
sand
site
sky
soil
stone
top
tractor
transport
transportation
truck
unloading
vehicle
work