HG/T 20592  法兰盖 BL 500-16 RF9ï؟½

BL500-16 RF9ï؟½

SO 2"-150 RF

WN125B)-16 RFط°آ

wn500-16rfsined=2

SO 100-150 RF/ Sch4.6F240

wn300-10m/

WN250(B)-40FM

PL 450(B)-10 RF C=

LWN 50-150 RF H=165

PL80(B)-16 RFM6070-0m/-16h8RJsF Sch8Sc467Ff)G-1Ã/-10 R)-16 RF.am4 f1=RFJ Sch1600