HG/T 20592  法兰盖 BL 20(B)-10 FF/50r50-1.6/50-1

BL20(B)-10FF/50r50-1.6/50-1

wn250-150 rf sch40 s=4.215 H1=20RFS

wn25b)-16 m c=16 s=65 c=2000-1.6/10

WN 40(B)-40 RF S=41.C-FM 500-1.6Sch40S3M s=6S56 RF6RJ

wn250(A)-10 ff65=21000MRFvÂ80S)52Scδ1=6FF2-1RF в…ЎЈВўГўвҖҡВ¬RF

47065.3 A4-I2Tn50