HG/T 20592  法兰盖 BL 300-10 FF C=RF S=6RFF6p

BL300-10FF C=RF S=6RFF6p

wn65(b)-100 rf s=FF-f/@425mF1

WN 250(B)-25 FF S=58001

47023 RF 500-1.006 RFRF S=3f sS)-H=u00a601

DN 900×900×900-Sch10 TR

wn65(b)-150 rf sch40a

bl 500(b)-16rf/ Sch12=4�

PL50(B)-25Ff1Fs=6.5S=205

bl100-10rf0RF00RFF0(

470