網友回答：
is part of china s key project of independently-developed "large aircraft family."the successful maiden flight from the sea is a major step forward in the development of this large amphibious aircraft following its maiden flight in 2017 and first takeoff
溫馨提醒：隨時光變遷，文中所陳述觀點；準確性、難免有所變動，因此文中觀點僅供參考。
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