HG/T 20592  法兰盖 BL 300-16 RF0 RF= S30408

BL 300-16 RF0 RF= S30408

3 fm600-1.6/50-1051

SO 250-6 RF RF6 fmo20(b)-6/�5Fh1@SCH8

BL 450- 40 RF=40.9440RF5 Sch40

PL 100(B)-16 RFb-16M

WN25-150 RF Sch40 AS/data/src

BL 80(B)- 63MFRFB）-25 RF-18B)

wn150(b)-16 rf s=6ä

WN100-63RF

BL20(B)-10 RF