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6????17????,????,??????????????????????????????????????300~560????,??????????????600~790???????????????????,6?25?27??,????????????????????????????,??,????????????????????????????????????,??,??????????????

??????????????,6??25?????????????20??26?20??,?????????????????????????????????????????????????????????????????????????????,????,????????????????????????????????,?(250~260?????????????)???(?????????????30~50??,??60????),????????

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3.?????????????????????????

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