GB/T 12459  弯头 DN 300-Ⅱ-690EL0 Ss RF50-16R6RFr H=2990RJRF

DN 300-Ⅱ-6 90EL0 Ss RF50-16R6RFr H=2990RJRF

WN400-150 RF Sch80s6RF209r=jmxinvok5 c/15.50G50.8sF300

法兰WN250-150RF Sch3043 B1

WN25(B)-100 RJ S=5m5/

BL 50-25 M(A

WN100(B)-16 mS=6ch6016RF20

wn500-25rf-44-170F5(b)-16rf40=122 n=4 C=16

BII 1000.6 R

WN