OTIS电梯用钢丝绳
wire rope for OTIS elevator
按钮自动控制电梯
automatic push button control lift
便携式电梯维护控制器
Portable Controller for Elevator Maintenance
并联电梯
parallel connection elevator
parallel elevator
残疾人电梯
elevators for disabled persons
超高速电梯
super high speed elevator
城市电梯监控系统
the monitoring system of elevator for city
等待电梯策略
waiting elevator strategy
递增制阶梯电价
increased price ladder system
电梯层间交通分布
elevator interfloor traffic distribution