HG/T 20592  法兰 PL 20-16 RF f1=5 d=10

WN 20(B)-25 M S=30 RF/14016

20592pL20(A)-16rf f1=5 d=10

WN 200(A)-10 FF S=8.18RFFch40R-0(B)-16=f

PL400(B)-10 FF D=R-1140SRF/6R

WN25-150RFC=40-30-1.6-300 Rrf16 RF S

SO 80(A)-25 RF rf b=586

wn50-150 rf sch=80s00 LF0R

BL80-150RF D=127

b wn1100-300 rf b