GB/T 12459  弯头 DN 50-1590EL/-1.6.6п

DN 50-15 90EL/-1.6.6п

WN50(B)-25 M f2=3 C=2016RF.6/85-1m3Sch1=4

WN50-150 RF Sch40-16 RF SCH40S75

20592 WN450(B)-16RF S=10Fj50 RF=8 20- m400-1.0 S

WN25(B)-63RF S=3

BWN 1100-150RF B=1086

BL500-600RF.0RF200-0./

SW40-150RF SCH80S/0.6SB)-6

LWN32-300RF21