HG/T 20592  法兰 PL 200-2.5 RFFLL4 S=5 H1=20 n=4

PL200-2.5 RFFLL4 S=5 H1=20 n=4

3 M 300-2.5 δ0=8 H=

WN 15(B)-25 RF

WN 6"-600 RF Sbs0δ=1rj&0(B)-16RFF2/Lf/

WN 500(B)-25 RF Sch40

3 FM 800-4.035r50 rf d®آ´8

DN 20×20×32-Sch140 TR

SO450-16FFFB)-

pl150-25 rf sch

SO 250-16 RF B=274 b=3M 1