HG/T 20592  法兰 LWN 25-16 RF L=201F S=10 f=2 RF S=10 f=2 S=6h=50F S=10 f=2Ã

LWN25-16 RF L=201F S=10 f=2 RF S=10 f=2 S=6h=50F S=10 f=2Ã

SP-518D=73

BL100-100 M C=H/=140510

WN300A-100RFfS0FrfJRFS=mpa0-1

bl40-10 m/b4=60 h=A)-16rf0-150 rfF1 RF S2

wn500(b)-150 rjSCch sompnbspa215 H

bl40(B)-160 fMFM500-2.5/42-105T2059r F1B

WN50-63