"Water Cube" is currently the world's largest ETFE inflatable membrane structure building. The inner and outer surfaces of the building's roof and wall structure are covered by a total of 3615 air pillows, with a total coverage area of 104,388 square meters (projected area).

https://www.youtube.com/watchv=8VidUIF8FM8&t=2591s

https://www.youtube.com/watch?v=1IjOwda2mIQ

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