HG/T 20592  法兰 WN 20-63 RF B=20.1

WN20-63RF B=20.1

SO450 (B)-16rfF=do=4/ Sch40SdRF a560 rfb)-10RaF 5

wn600-25fm80

SW 3"-1500 LFMpampampampampampam

WN 150-300 RF S=S=7.1 S=5.60rfF-5 g- Sch100F

WN 000(B)-16 RF L=195 RJ@6@AF

WN 3"-300 RF S=10

so450(b)-10mf

WN250-25RF S=12data