HG/T 20592  法兰 PL 250-25 RFF S=3.5b)505-200-1=1RF sch40/RF))

JB81 PL250-25RFF S=3.5b)505-200-1=1RF sch40/RF))

wn250(b)-10 rf s=6/a.400-B=125F0-16 RF0-10R60s

wn200-150rf sch0 M5=8S��═00

LWN 200-600 RF/6S=4bF S=106

法 兰 WN125(B)-16 RFF Sch80.6100-1.0)-16RF�SRF f1=3 C=202S/51 Sch80Sk��п╡16/