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?????????????й?,????230??.????20 mm??PE?????2???????????.???????????????,PE 100?215~235??,PE 80?200~220??,????????????????,???????,???????200??????,????????,???????????230??????,?????????????????????.
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???????????200??,230???280??.?????,?????PE????????????е???,?????????,????????,??????????.PE???????,???????,????????????????????????????????????.????????ж?????????????????,?ж??????????:???????????е?????????桢????????????????zui????????????,???????????麸??????.
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(I)??????????pe?????????;
(2)??????????,?pe??????????????????,???????;
(3)??????????200~230??;
(4)????????,?????塢???????????,????????.
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