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?2??????????7???? ??????:????,???????,????????????6??????
?,???????????6????,???1?????????????26???,????????????????????????????????????6000??????????????????????????,5??,?5.2??,??6?????,??????????7????????????????????????4.0????
?????????????,???????????????????????,???????????????????????????????????6???????????,?3???3???
?????????????,?????20000????,?????340?????????,????????????11000??,???
??,?????????????,?????????????????,???6?????????????????????(?????????) ??:????????????????