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Levitation. Maglev trains have no contacts with the rails while they move forward. They are levitated on the guide-way with the help of magnetic forces. Levitation is the process by which an object is suspended against gravity in a stable position without any physical contact.
The Shanghai Maglev Train works under the German system (Transrapid), the frame of the train wraps around the guideway and the car levitates 3/8. by magnetic attraction to the underside of the track. The clearance is obtained via a closed-loop control system.