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/image%2F0266284%2F201301%2Fob_b853e555cab5080a840365d87e0d2a5a_image.jpg "un po' di teoria e un po' di pratica... per mettere in pratica la teoria.")
New Principle of Helicopter Operations Invented in Belgium
Pubblicato il 22 Agosto 2013
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New Principle of Helicopter Operations Invented in Belgium
http://interestingengineering.com/new-principle-of-helicopter-vehicle-invented-in-belgium/
http://interestingengineering.com/new-principle-of-helicopter-vehicle-invented-in-belgium/