GB/T 12459  弯头 DN 1200-1090E3DRF=D1RFRF r sch4

DN 1200-10 90E3DRF=D1RFRF r sch4

PL50-6RF(B)25RFRF D=140,

SO600B-10 RF HG/T 20RRF@so RJb=40 RFF Sch4050 RF

47023 m1200-1.6 ã b

WN500-25 G S=18

PL 250(B)-25 RFampa10 T62061590.5 B=90.4 C=10 K=15

WN25-300 RF Sch40S10-1.6 S/u00ef/u00bc/u

wn150-150 rf