英文關鍵字
apparatus
background
big
black
building
cable
cargo
closeup
construction
crane
development
elevator
engineering
equipment
factory
handling
hanging
heavy
hoist
hook
industrial
industry
iron
lift
lifting
load
machine
machinery
metal
metallic
moving
object
old
overhead
part
picking
plant
pulley
rope
rust
sky
steel
strength
tool
weight
white
winch
work
yellow