英文關鍵字
action
activity
backhoe
bucket
building
bulldozer
construction
crawler
dig
digger
digging
dirt
earth
earthmover
equipment
excavation
excavator
field
gravel
ground
heavy
hydraulic
industrial
industry
loader
loading
machine
machinery
metal
mine
mining
mover
outdoors
power
quarry
sand
scoop
shovel
site
sky
soil
technology
tractor
transport
transportation
unloading
vehicle
work
working
yellow