NB/T 47021  法兰 C-M 1200-1.6/20δs=16

1 CM 1200-1.620δs=16

47023 T600-1.68 B

WN 15-300 RF Sch40hhgca)F.ht0RF

20590 PL150-10RF30ph10

WN300(A)-300 M0r010 rf/12

3 FF 800-15TRF5

WN20-150 RF66-f b= RF8pamp

wn500-25 rf/f-1.r

WN125-1500RF59…½

WN500-16 RF HG/T20592F s0RF210S0.-26-5 90ESmfm