HG/T 20592  法兰 WN 150-25 RFS=3.50N8Ggcad RF3

wn150a-25rfS=3.50N8Ggcad RF3

wn20(b)-63 rf s=4WN125-150 RF5 45

BL250-150RF 内116ch20R4 1500-0.25RF)-

47021 -rf 1800-0.25 δ=14

so80-25rf c=26156.6´=56 h=165/rf b1=0 SCH40

BL100-900 RF SchB H1=1ch40 A=8RF S

pl600-6 rf hg/Frf G5=1aa5=5 h== B= c

3