HG/T 20592  法兰 WN 50-25 FM S=4

WN 50(A)-25 FM S=4

WN 100(A)-25 FM S=4

WN 80(B)-100 RF S=5.5

WN20-300rf SCh80s/hf s/u0��

WN 25(B)-40 RF S=5.5

WN 25(B)-25 RF S=3.38

3 FM 500-4.0 δ0=6

3 CM 1100-4.0 δ0=20

3 RF 1100-4.0 δ0=20

PL 50(B)-10 RF3/u00a6S=B=154n=8 h=331.5��Ņ‚ē�