HG/T 20592  法兰 PL 50(B)-16 RF7b=1 b=4.5f/ ⅡRF42fs=105

20529 pl50(b)-16rf7b=1 b=4.5f/ ⅡRF42fs=105

WN350B-40FM=560 aa=41210 aa=550-1.6ampamF0255ampa

wn100-150rf,sch803001A0C=260 Cd=FF HG/J=70b)-define.6/

wn300-150 rf asme b16.5

WN 80-150 RF Sch10S05 ScB=30 b=3h40SM0-2.

WN100- 150RFSc50)-1 nL4Fjn/-400609