英文關鍵字
action
activity
backhoe
blade
bucket
building
bulldozer
construct
construction
contractor
crawler
development
dig
digger
dirt
earth
earthmover
equipment
excavation
excavator
gravel
ground
heavy
hydraulic
industrial
industry
loader
machine
machinery
metal
mine
mover
moving
operation
outdoors
quarry
road
sand
sandpit
scoop
shovel
site
soil
tracks
tracktype
tractor
transport
unloading
vehicle
wheel
work
yellow