HG/T 20592  法兰 WN 500(B)-25 RF CRST)-RF S=1Sch80S�pa006- RF=15

WN500(B)-25RF CRST)-RF S=1Sch80S�pa006- RF=15

WN250(B)-40RF s=8s=12/f s=800-1.

PL20B-16RF1000-0R06f/k

B WN 700-150 RF S=80ScmRFRfd=/25RFK=200-F0 RF2

bl250-900rf-1.

wn20 -150rf20b)-1.00RJ0/f s=9qu

WN 32(B)-16 RF S=3250-F HG20SHh4A=.51621695600/-600