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?2???????????13???????????????????????????????? (? ??)????????????????????????????(???????????????????????????)????????13????????????,±800?????,??

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2??12???,???????????????????????,?±800???????? ??????????????????????????????

±800???????,??????????????????????????2020????????6?30???????,????5?????????,???????????????????700???????

?????????????????±200?±400?±600?±800???,?6????????????????1??????????????1?????????????????????????????±200???????

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?,???????,??????2000??????????????????,???

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