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???????2?18??????? (??? ???????????)???18?,???????????????,???????�???????????????�,????,??�????�?????,??????????????????,???
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?????????????,�????????�??????????????????,??????????????,????????????,???20?(??????)???0.3%/????????,20????????0.5%/??????????????????????????????????????????????????????????????
???????????,???�????????�???20???(???)?????,?????????20????,????????????????????????,???????????????????????????????????????????????????????????????????????????(?) ???:???????
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