HG/T 20592  法兰盖 BL 450-40 RF0.RJ250FFF-A

BL450-40Rf0.RJ250FFF-A

WN 32(B)-10 FF S=10

PL50-10RF HGT20592-200

WN125-300 RF Sch100

WN20-16 RF S=25rfs=30 asme b1

20592 wn450-16 rf500 r

SOP FF 5K 100AF b=2c4

LWN 25-300 RF Sch120mFSCH4

WN150-300 RFWN80-

BI 500-F(S)5rf100=465=1-1F5 Sch8AHAHS5 RJF�