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??????????257??????????,???????????????170?,??????6???11??????64?????
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66??????????23?“????”
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A380??????????497???
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A380??????????497???
2017???????:????????????6.…
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3?13??????????????
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62%?????????????
3??????PMI????0.5?????????…
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3?13??????????????
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???????????2.5???23.4?
???:??100???????????