HG/T 20592  法兰 WN 100(B)-25 Ms=4.0mm0S)--6Fh40SJ00F@RFch60@RF@4 R

wn100(b)-25ms=4.0mm0S)--6Fh40SJ00F@RFch60@RF@4 R

WN25-150 RF B=19

WN 80-16 RF Sch40s°F1Ff@4 RF B=1252.5/7��ذ�165FS@RF5@FSFS1@ch4SS5 R

WN80(B)-16 RF4246964

3 B4052

3 B1944)-16 RF2659041Rsch553 RF Sch60 304.30.6sF4 RF ⅡF S=4-6 RF..5 RJj@5c2@R