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???????????????1??22??? (????????????????????? ?)??22???????????????????,?,?????????????????????????????

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??,23?????????????????27????????,??????,?????,????????????????????????????????????????????????????????????????,??3?8cm,???????????????12cm??

“?????????”??,???,????,????????????,??8????????12?,??,?????????????????????14??,????4????6?????,????7??9???????????28????????????,???????

????????????,??????????,??????,????24??27?????,25???????????,?????????????????????????????????,????????????,?????????????,????????????????(?????????????) ????????????????:?????