?? ??????????? ???3?
????:1???????:????????
2?????????????
3?????????????
4???????
5???????
??????????9???20????????? ?19???,??,?3???????????
17?????,??“Yak-18T”??????,?????
?????????,??3??????
??????????????????????aviation24?????????????????,????????????????????????????“?????”??,1700????????????????5????????????(?????????????????????) ???:?????????????????????