GB/T 12459  同心异径管 DN 50×25-Ⅱ-3RCh40RFJ12 S640S11M=1

DN 50×25-Ⅱ-3 RCh40RFJ12 S640S11M=1

wn150(a)-150 RF sch10s/

WN 200(B)-16 RF S=16

PL 100(B)-16 FF

WN400(B)-10RF S=10-1.LFM-150RFF80F b19RF5

BII 3000

BL400-25 RFM S=5.0 S=6.5F-150-5-2

WN20-63 FM s=4

1 RF 700-0.6 δs=8

BL50-300 RF Sch406/sch40650r9