HG/T 20592  法兰 PL 50-40 RF RF4./7S=1

PL 50(A)-40 RF RF4./7S=1

20615wn100-600rf=276 c

47023FM350-4.06rf0F42Fb=/

1 M300-1.004450/45-1550-

47021 c-rf900-1/ker/j

wn300B-16RFh40 n-m.h11�40

WN 65-300 FM Sch40S H1=80.012R10

47023 WN50-300 RF B=4

法兰 LWN50-300 RF Sch80quotwn10

WN 15-150 F