GB/T 9124.1  法兰 DN50-PN16 PL RF Ⅰ =5)-6/50-1

DN50-PN16 PL RF=5)-6/50-1

WN20-63 RF H/c=23.5 b=4 a13

B16.5 WN350-900RJ0RF S=1

WN 200(a)-16 RF S=3F

wn 200b-25 FM/-0.6.0

PL 40-25RF0 R/)-130=2ScfS=4.50-c0=56 hF IL RF40m

DN 1100-Sch60 LJSH

WN80(B)-25 RF40RRFB)schFF80Bsch40-

WN 25-150 RF S=4.55

PL 250