HG/T 20592  法兰盖 BL 20-25 RF.F060SSM0 RF�@RF@4 Rch4406R-1500

BL20-25RF.F060SSM0 RF�@RF@4 Rch4406R-1500

PL65-10RF G6RF S=5

WN 40-600 rf†ذ¨ذ

en1092-1/@a 1000

JWN 50×80-150 RF Sch40

SO 500(B)-10 RF

WN 100-150 RF80H��F.5RO0@00 S�(40RF-R�@4п▓��

WN 500-150 RF S=10

WN1/2-600RF

20592 PL250(B)-16