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????????,?????????????,??????“??,????????,????”????????,????????,??????????????????????????25km/h?

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??????????,??25km/h????????????????????????,????????????????????????????,?????????????????

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?????,??,“??????,????????,???????????30????????,??????????????40?????????????”??????????,“?????25?????,?????????????????,????????”????????,“????????????,?????????,???????25km/h?”

“???????,??????????????”……??????????,??????????????????????????“??”,????????????????,??????,????1200W ???????,?50km/h,???????????1500W ????????????,?????70km/h??

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