... effect for passengers. ADVANTAGESInterlock system: there is magnet in the ramp, and there is proximity switch at the left oframp, ... will be warning signal at theinstrument desk.Easy installation: this ramp has been assembled before delivery, so the only thing ... strong non-corrodibility and so on.Low installation requirements: this ramp is mainly applied for low-floor city bus. It isinstalled ...