HG/T 20592  法兰盖 BL 450(B)-6 FF FFR

BL450(B)-6 fF FFR

bl40-160fmch40(b)-

lwn100-600rf hδ=5/64F0 f1=2.5

pl50(b)-6rf b=3M 1400-1 g s=3-0.6 BB=08.(A)b)0-1S==21/00F

bl200(B)-16 RF-

WN150-16 RF S=8-16r

WN15(B)-1500 RF.009 WN2

SO20-16 RF

bl32-160rfR=600Sch60

PL 500(B)-16 RF b=-4.0�900