HG/T 20592  法兰 PL 150-25 RF b=3

PL150-25RF b=3

WN 65-300 RF Sch40

WN25-300 RF ASME B16/

BL250-16RF

WN 125-2500 RF S=4

wn65(b)-16 rf D0 f

WN50(B)-16 RF

WN 3"-300 RF Sch80

WN 450(B)-16 RF S=5

wn 150(b)-16 rf rfbce3B500n S=3000175 δs=5400(b)-25 r�´0=10/21RF 500-f/@f R S70-400.2