HG/T 20615  法兰盖 BL 150-150 FFRFrf

20615 BL150-150FFRFrf

47023 rf300-1.0 h=80

pl350(b)-6 rf

pl40(b)-10 rf b1=49 f1=3 c=16

2 RF 1800-1.0 δ1=10

WN 32-300 RF Sch40S

pl50(b)-16 rf/static/draw

JWN 25×50(A)-25 RF S=S=4.55

pl50(b)-40 rf b1=51.5

WN 40(B)-16 RF S=59.5FF.0S Sch80(B)-1rf2521FR