GB/T 12459  弯头 DN 500-Sch10S90ELRF6f-150 rfF�46

DN 500-Sch10S 90ELRF6f-150 rfF�46

BL50-600RF15/10/5 SCH205SC/

SO100-150 FF-10 RF540F0-01 R2-2=4@

B WN 34"-150 RF B=860

WN65B-63FM-1.-6rffef45 SO300(rc

WN 15-300 RFrF bl100-n100(b)-16

BL300-10RF HG/T 205920EL5-

bl800-10fm=2.ScSch4F7

PL250 -25 R