HG/T 20615  法兰盖 BL 20-300 RF Sch40

BL20-300 RF Sch40

WN 100(B)-100 RJ Sch4

wn32a-40rf s=7ff4N25-250

WN20-150 RF/u00a-12s

PL200-10RF

3 M 1000-16 δ0=12

PL80B-16 RF

WN 450-150 RF S=12

BL450-40 RF

WN 100-100 RF/9119/-16 RF S=800FF407.5 RJFFJ040/mF S=20EL0/0liRf01 FF189ampamp;amp;amp;amp;