HG/T 20592  法兰 SO 300-25 M 20/u16 RF RF

so 300-25 m 20/u16 RF RF

WN125 -16RFF RF150F0-1./@BII 10=60 H=

3 RF 450-1.020δ0==f s/u0

wn 500-16 RF H1=362.5/21

so80b-150RF11

WN 25(B)-25 RF105Js8h�RF1510RF

WN32B-100RF RFR

sp-3-8-1A-1660/-f=Y4-160h40)0�

wn 80-150 rfSchSch4000-1.FH=-mp2 r40/mpa