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Moving box

Running the length of the terminal building two levels below ground is a 1.7km concrete box girder. 36m wide and 8.5m deep, it contains six tunnels. At the centre are two 9m wide corridors for the airport's rapid internal transit system, the advanced people mover; two 3m service tunnels flank these; and on the outside come two 9m tunnels dedicated to high speed baggage transfer.

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