HG/T 20592  法兰 WN 50(B)-40 FF s

wn50(b)-40 ff s

SO150-150 RF12025RF Shgc000-150 RFFF0EL46

SO 25(B)-16 RFf0659RF42 fF r50RFB0 ST Sch100=2

SO 200(B)-16 RF7 s00A/

JWN 50×80(B)-25 RF S=2.9

SO 40(B)-16 RF-1500 RJS DNF

SO 700-16 RF0s04fFT196¶15NRF/(B) Sch1

wn80-63rf s

BL150-300RFch