HG/T 20592  法兰盖 BL 300-16 RF’j=1

BL300-16RF’j=1

wn300(b)-16 rf s=4

WN 80-600 RF Sch40S

SW25-16 RFa/data/0s10fmHG-RF/FFFF0RFf4h8

PL 25(B)-25 RF

DN65-PN10 PL FF �1RRF))S2RF2560RF554 RF Sch40S5-

WN25-300 RF2R s RF S RF S sch40.h&a80fin

BL 125-25 RF-20 RF Sch8002+3.630-/

WN25B-63RF&