????bsfa999

> ???? > ???? > PVC???

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??????:????????????????,????????,?????????,???????,???????????????????????????30-40%,??????????????????????????????????,???????????;??????????????,????????,?????????10-20%?

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1?????:?????????????????????????????????????????????,??????????????

??????????????????:

???????:?????????????????,???????????0.1-0.2??,??????????????????10????

??????????:?????2-8???,??????????0.2-0.5??,????????????,????????????

??????:????????????,???????????????,?????0.5???????????????1.5???,????????????????????

??????????

2?????:??????????????????????????,??????,??????

??????????????????????????,?????25-100????????????????0.8-1??????????????????????????37.5-50??,????????????,????????????????????,????????????????(??0.5-1???)??????????????????????????

?????:????????(??)??,??????????????????????,?????0.1kpa? ????0.15-0.25/?,????????????700?,PE??????120????

?????????????????,??????????????????????????????

???????:

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?????????PE????:

(1)?????

(2)????????

(3)????????

(4)????????

(5)???,??????

(6)?????

(7)?????

(8)??????

(9)?????

(10)??????????

PE?????????:

(1)???????????????

(2)???????????????????

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