stepping switch

例句：

1. 1. The new elevator has a stepping switch that allows for easy access to the upper floors.
   新电梯有一个踏步开关，方便人们轻松到达上层。
2. 2.The technicians replaced the old stepping switch with a more modern one.
   技术人员用一个更现代的踏步开关替换了旧的。
3. 3. The stepping switch was designed to prevent accidental activation during heavy use.
   踏步开关的设计是为了在重使用中防止意外激活。