HG/T 20592  法兰盖 BL 500-10 RF/RF R-4 DN=m16R

bl500-10rf/RF R-4 DN=m16R

A WN 800-150 RF S=S=12

BL350-25RF

PL 300(B)-10 RF

3 M 500-4.0 РһТҷ0=10

WN 500-40 RF

WN 2"-300 RF S=S=5.49

PL20(A)-6 RF b=3

B WN750-900 RJ00R40R

47021 c-rf1200-0.25�5RF/m20-16RRF S= RF70-16 B5F0h=16521 H=22;am0/u00c6