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    pe?????????????????,??????pe????????????ж?????,????????С?????????????°?.
    PE????????????????,?????????????????????ж?????????,PVC?????????????,????????????????????е???????.??PVC???????????????,???????????????,?????20mm??PVC????????4???????;???16mm??PVC????????3???????,????????????????·??????????. PVC??????????ι?,????????;???????????PVC???,???PVC??????????;PVC???????,????????????????.
    PE????????????,?????,????????С,???????????????????????????????????,??PE????????????????ж?????????,???????????pe?????????????????????.?????????и?????????????к??????,PE????????????????,????????????????,???????????????????????????????.

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