????:1???????:?????????

2????????????

3?????VX

4???????????

5???????

??6??????????5??????????(???????????)??????????????,???????????????????ARJ21????C919?????????,????,??1???????,???????????????(SAF)?,???SAF????????????

???????C919????ARJ21????SAF????????????????????,??“??”?????????,??,????????????????????????????????????????????(3??????)??????40%,?????????????????????????????,???

?????,?,??????????????,?????“????????????????”,???????????“?????????????????”,?????“?????????????????”,?????“????”,??????“?????”(??????????????????)???

??????????????????,????,??????????,??????????????????95%?????????????????????????????SAF?????????,???????????????,?????

???????????????????,SAF??????80%????????????SAF????????????????????????,??????????????????????????????SAF??,???SAF???????,??????SAF????????????

(???????????????? ????? ?????? ???????? ??????????????? ???? ??)

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