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2????????

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

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ARJ21??????(SAF)????????/????

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ARJ21??????(SAF)???????????????/?????

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????,SAF???????????80%???????????????????SAF???????,??????????????????SAF????????????????????,???????????????????????????????????????SAF??,??????SAF????????????????????(??)

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