GB/T 12459  弯头 DN 500-Sch12090ES0-1 R42 n40F

DN 500-Sch120 90ES0-1 R42 n40F

WN 25(B)-100 RF

SO 350-150 RF

wn250b-25rf2.5 g=

wn25-1500fm s=616 aa

BL400(B)-63 RF

BL4"-150 RF

PL50B-2.5RF�5 RJ-1671@20 RF FM46-115ch80SFmpS Sch80100mh160 Sch40 Sch1600M150

BL250-900RF

WN 15-100 M Sch40SschM51