GB/T 12459  同心异径管 DN 100×50-Ⅱ-5RC

SF304L-DN100×50-II-5 RC

wn40(a)-16 rf n=56

SP-6-20-126404 D/

AWN 1000-300 RF

so 25-150 RF

wn40(b)-1500rf

wn40(a)-40 fm

SOP RF 16K 20A/

wn250-300RF

WN 32(B)-150 RF Sch40SS=6.35B=/tHG20615Sch40SS180-0.6- s=4δ0=14 Ⅱ S=12M S=7H0500-RF-1.616 RF S=3.5r