GB/T 12459  偏心异径管 DN 350×300-3RE0B-1 RF-a0R

DN 300×350-3 RE0B-1 RF-a0R

WN 250B-16RF S=8

BL 150-25 RF

LJ 2"-150 RF S=S=3.91

WN 20(B)-25 RF S=4

WN 50B-16RF

BL 50B-16RF

BL 25-900 RJ

WN 80-150 RF S=5��» pl65(b)-10rf8-107RF(A)-25(a)

NB/T47023 FM1200-1.0AS/ch16 RF.6 S=J2G BL800(b)-1300r