HG/T 20592  法兰 SO 200-2.5 RFF3/u0-1 16R70250 RF0f=4.rfâ5w303F0s s=84 RFH=

SO200-2.5 RFF3/u0-1 16R70250 RF0f=4.rfâ5w303F0s s=84 RFH=

WN15(B)-40 M.5/J-56(B5-0

1 CRF 900-1.0 خ´s=10 s=90-s25 B1.0.5

pl400(b)-10g/e˜ K=3/c

1 CRF 900-1.0 خ´s=10

PL50(B)-10RF7Sch4F2m1Ff

PL10(B)-6 RF/

1 M 800-1.0 δs=10

wn20-40rfF0/

WN 65-25 RF