HG/T 20592  法兰 WN 600-40 M s=4f D=90/f s=-0.6-1.005

wn600(a)-40 m s=4f D=90/f s=-0.6-1.005

wn600(a)-40 m50

20615 WN150-150RF00-1.0/80-19500-1.0/10 RF

lwn50-300rf hF f1=0F27000

wn 300-150 RF.or/MF00kerJ50RF B50(b)-16CH80110MO80RF405ff sch460=-

WN20-300 RF Sch160

PL 300(B)-6 RF

WN 80(B)-16 RF S=6f2)-

PL