Çok güzel anlatmışsınız elinize sağlık...

helikopterleri de takip ediyorum uçakların yanısıra, özellikle yeni teknoloji ürünü bıçak rotor çalışmalarını, yeni malzemelerin ortaya çıkışıyla gelinen noktayı.. mühendislik faaliyetlerine hayran olmamak elde değil..

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