英文關鍵字
against
cable
cables
clip
construction
counterbalance
counterweight
crane
electric
electrical
elevation
elevator
engine
film
gear
gears
height
hoist
hoisting
industry
iron
lift
lifting
lifts
mechanism
metal
metallic
motor
pull
rope
rotation
rotor
sky
spin
steel
the
video
wheel
wheels
winch
wire