Eurocopter announced the sale of 15 helicopters at the China Airshow in Zhuhai today.The aircraft will be built for two companies. Offshore operator and long-standing customer Citic Offshore Helicopter purchased 10, twin-engine, EC155-B1Dauphins.Powerline and pipeline surveillance specialist Allyway will receive five, single-engine, AS350-B3s Ecureuils.Eurocopter said it and its China-based subsidiary will begin delivering the helicopters in late 2009. For related news