GB/T 12459  偏心异径管 DN 900×15-Ⅱ-4RE

DN 900×15-Ⅱ-4 RE

SO 350-150 RF

WN50-25RF(B16

SO 3 1/2"-400 SMR0.2516F S5bsp.B)40

BL20-40MF0/64-Gf

BL 40-100 t=ch160F5 N=298 B/-16

WN 80-150 RF Sch80SRF RF

WN 600(B)-25 RF Sch10S

pl450-25rf bmpq¥ch40SuSFRc

BL 700-2.5 RF2009-o50-1rf6RF500rse31