英文關鍵字
elevator
construction
lift
transportation
urban
future
structure
engineering
machine
interior
building
industry
city
inside
machinery
steel
metal
shaft
staircase
actuator
bunker
cabin
cage
drive
hoistway
hydraulic
nuclear
open
passenger
public
roller
safe
secure
sliding
stairs
stairwell
system
traction
vault
space
architecture
engineer
industrial