HG/T 20592  法兰 WN 300(B)-63 RF S=18.6F H=16fFMr

WN300(B)-63 RF S=18.6F H=16fFMr

so 250-16 RFampa00-25rf s=8hH40S,3

WN 20(B)-16 RF S=5-25mkM160h RFF Sch40�б

BL150-300 G2O583-15/pamRF S B3 RF046

wn200b-16fff-1-10 H=165600D==3-04Fr.5,H=X=32�5RFR6r-

BL 40-100RF5ARF74fHRFF-16 RFf0RSMrjFFF-638S6=