英文關鍵字
action
activity
backhoe
big
build
building
bulldozer
clear
closeup
construct
construction
dig
digger
digging
dirt
earth
eathmoving
engineering
environment
environmental
equipment
excavation
excavator
ground
heavy
heavyduty
industrial
industry
loader
machine
machinery
mover
operations
piston
power
sand
scoop
scraper
shovel
site
soil
space
terrain
tractor
vehicle
yellow