[机] army rating method of aviation fuels

háng kōng rǎn liào píng jià fǎ ㄏㄤˊ ㄎㄨㄥ ㄖㄢˇ ㄌㄧㄠˋ ㄆㄧㄥˊ ㄐㄧㄚˋ ㄈㄚˇ