Concept
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Oligopoly in Aircraft Manufacturing
Manufacturing commercial airplanes takes a very large initial investment in technology, equipment, and licensing. Consequently, the industry is dominated by two firms.
Source
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"Qantas a380 vh-oqa takeoff heathrow arp."
http://en.wikipedia.org/wiki/File:Qantas_a380_vh-oqa_takeoff_heathrow_arp.jpg
Wikipedia
Public domain.