GB/T 12459  弯头 DN 350-2290EL5 RF)5)Rh40F

DN 350-22 90EL5 RF)5)Rh40F

PL200-25rf-)-

WN 500(B)-40 M-2

PL 150-16 RFFFJrjs)-2 s=1.6-16 RF0 Mg

IF 65-150 RF

WN300(A)-40 G9295R0010.21f500f21-16g5

BL600-25rf07F S=Sc

DN 40×20-Ⅱ-8 RC

NB/T47023 FM1200-2.51-H8Fpl14CRF800-

3 cfm 800-2.5/1rf0ch30otRF-R