HG/T 20592  法兰 WN 100(B)-40 RF S=4RF500-2.51rf0 RF Sc

WN100B-40RF S=4RF500-2.51rf0 RF Sc

wn80a-25rf s=7.5-2011 Sch4 K¬a

bwn1000-300rf52bF3400-4/-1100f a1 b= aa=

WN250-150 RF Sch40 S=8.56

WN300-150 RF S=3

PL25(B)-25RFwn50-60/1amp;amp;amp

2 M 700-1.6 δ1=16

&ampampampampampampamp;amp;amp;amp;amp;quot;