??????????????????
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?????????????????????????90?????????????????????????????????????????????糧???????????????????????????????У?????????????á?
???????D671F
?????????DN40-DN1000
??????????ī??????304??316
????????????????????????????
????????PN1.0MPa??PN1.6MPa
???????EPDM??-30?桫120?? NBR ??-30?桫80?? PTFE??-30?桫140?? VITON??-30?桫150??
??????????ī????????????????????????304??316??316L??1.4529??2507
?????????????410??304
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