英文關鍵字
crane
support
leg
truck
worker
walk
anchor
rod
ground
fix
construction
site
steel
vehicle
heavy
machinery
work
equipment
machine
working
industry
industrial
transportation
development
excavation
hydraulic
day
technology
英文關鍵字
crane
support
leg
truck
worker
walk
anchor
rod
ground
fix
construction
site
steel
vehicle
heavy
machinery
work
equipment
machine
working
industry
industrial
transportation
development
excavation
hydraulic
day
technology