NB/T 47021  法兰 RF 450-0.25 δs=3amp40m�o����@RF@4 Rch440�@RF@4 Rch RF b=/5b)B=h1577.5 RJb=5 RJf/h40ch

1 RF 450-0.25 δs=3amp40m�o����@RF@4 Rch440�@RF@4 Rch RF b=/5b)B=h1577.5 RJb=5 RJf/h40ch

WN 300-600 RF B=562

47065.2 A6-1200-6

WN 8"-300 RF

PL 150(B)-10 RF B=156

DN450/PN16/05B

PL400A-10RF

DN200/PN10/02&35A Sch40S

TH(NPT)32-25 RF

PL