HG/T 20592  法兰 WN 80(B)-100 Mf╤Γ┬Α┬γ╨μ┬Ε╨ν┬Π╤Γ┬Α┬Φ╨μ╨Ψ╤Γ┬Α┬Υ╤Γ┬Κ╨Ε╤Γ┬Α┬�