????????
???????
?????????????????????????ó????????????????????????????á??÷????????С?????? ???????????????????????????????????????????????????????·??????????λ?????????? ???????С?????????????????????????·?????????????????????й??????????????????
???????H48Y??H??
?????????DN50??250mm
?????????PN20MPa
??????????160??
????????? ASME B16.34??JB??T3595??E101
??????? ANSI B1 6.34??JB??T74 ??JB??T3595??E101
??????? ANSI B16.10??E101??GB??T15188??1??JB/T2766
????????磺 ASME B16.25??GB??T12224??E101
?????????飺ISO5208??GB/T13927??JB??T3595
