NB/T 47022  法兰 RF 1200-1.0 δ1=10

2 RF 1200-1.0 δ1=10

PL100-16RF

PL 150(B)-16 RF f1=3 D=284 C=23 b=3

WN 25(B)-10 RF S=2.5

PL250(B)-16 RF L=25

pl32(b)-10 rf f1=1

WN250-63RF16RFFsF6RFU

B BL 22"-600 SFM

WN20-300RF S=492-s50

WN 65(B)-10 RF S=2.5ch40S RF Sch4050fRFspampampampampampa