GB/T 12459  同心异径管 DN 200×100-4RC0-2=90

DN 200×100-4 RC0-2=90

WN 50-300 RF

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WN100-300 RF B=87.32

SO 100(B)-16 RF

SO 80-300tR

WN600-40RF S=16

BL20-600T003809�.6/48*1227-19A B

WN20(B)-25RF s=3(B)-40 RF6

PL40(B)-16RF.25FM2000-4 RF SchFSchF.6500 SCH160rf2/hF05.60