英文關鍵字
construction
site
heavy
machinery
field
machine
excavator
dirt
soil
bucket
working
vehicle
equipment
industry
work
earth
industrial
loader
tractor
transportation
development
excavation
hydraulic
digger
day
technology
英文關鍵字
construction
site
heavy
machinery
field
machine
excavator
dirt
soil
bucket
working
vehicle
equipment
industry
work
earth
industrial
loader
tractor
transportation
development
excavation
hydraulic
digger
day
technology