HG/T 20592  法兰 WN 300-16 M S=10=210

20592 WN300-16M S=10=210

20590 PL10-10RFF63rf s=5.0f1000--1

wn80(B)-63mN40

WN 25-1500 RF S=4015-2009S=5S=F

wn150(a)-16rf sch80150 RF

BL 40-16 RF16 RF.011=-16 R

WN40B-16RF S=5)-40RF13mm0-140=3=5pampampnbspæ&-1.0/401D=655

WN150-300 RF Sch40f1.

bl600