NB/T 47022  法兰 C-G 650-4.0/20δ1=1

2 CG 650-4.020δ1=1

DN25-Class300 WN RJ0591F Sch=630S0 Mfh4 RF

PL150-6RFRF7F1RFRF

wn 450-25 mfm

DN125-PN160 WN RF Ⅱ S=7

WN 100(B)-40 RF S=5

WN50-40MS=650 rf40S16 RF Sch=630S0 Mfh4 RF

BL 400(B)-16 FM¬â¬sc9

wn400b-40rfFG S=4MRF60-120δ0

WN 500(B)-