英文關鍵字
action
activity
background
backhoe
bulldozer
car
construction
crawler
dirt
earth
engine
engineering
equipment
excavator
gallery
heavy
industrial
industry
landscape
large
light
lighted
loader
loading
machine
machinery
mechanical
metal
mining
nature
outdoors
plant
red
sand
scoop
site
sky
steel
technology
turn
vehicles
workers
works
zone