GB/T 12459  同心异径管 DN 80×50-3.05RC�5 RJ-1671@=12.5 &a

DN 80×50-3.05 RC�5 RJ-1671@=12.5 &a

3 FM450-4.000.6 rH

WN 3"-300 RF Sch80S

47023 fm700-2.5/80-145@5@RFЈRJ Sch044

bl25-40RF

wn365-25 RF00rfch80S�rFFmpa1217.5 RJj@5c2@RF@443RF SCH40S6 RF&ampampampampamp

SW 40(B)-25 G

WN 750-150 RF

GB/T