The UH-60M Upgrade is currently the only fly-by-wire rotary wing aircraft in flight test development within the Department of the Army.Sikorsky is a subsidiary of United Technologies Corp.是什么意思_The UH-60M Upgrade is currently the only fly-by-wire rotary wing aircraft in flight test development within the Department of the Army.Sikorsky is a subsidiary of United Technologies Corp.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句