HG/T 20592  法兰 PL 100(B)-16 RF d=310RF=50)1

pl100(b)-16 rf d=310RF=50)1

pl80(b)- 10 rf6R-6pampampampa00e2h.5/6RF)-

JWN 50*80-300 T Sch40S FM-=18 undefin36R)

WN350-300 RF sch40sF298-1 S=716rfS=8

WN600-300 RF Sch3010pquo RFME1M-

WN150-1500RJ-Sch120FRF/t216ampaF/2 RF105FP

wn300(b)-25 ff M==S TwB)