1. an LCO or Line Controller control on main routes.2. the DCO or Depot Controller control the vehicle in the repair center.3. ECO or Controller through control Engineer Scardar the remote control and the system, such as air, plumbing, Elevator, fire cut power supply and lighting in the tunnels.4. the CSO or Communication & Security Controller has the duty suspension system and all the safety.CCO Chief Controller or with 5-page examination of each position.
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