HG/T 20592  法兰盖 BL 300-16 RF=40RF Sch40ampRF S=101.0/

BL300-16 RF=40RF Sch40ampRF S=101.0/

bl50(b)-16 rf ,hg/500-

pl32-16 rf.0F SC150rf417hPL

wn100-160rf2-2009 W/.5FR5H50a25m=16=

WN 150-300 RF Sch401f1=7940 Rin0n-2.5-1

PL100(B)-16 RFRFf/f &am

1 CRF 1800-0.25 �00 RF Sch40RF0=/400 bbБ┬≥Б∙≈п�