GB/T 12459  偏心异径管 DN 500×300-Sch10SRE δ=5

DN 500×300-Sch10S RE δ=5

wn100(b)-150 rf

PL 300(B)-10 RF

WN25-300 RF Sch40s/f009RF(

BL50-10RF

wn100-300rf sch80s

47023fm500-2.5/40-1104-

WN25-150 RF-120N25-1H160pl 350.566

AWN700-150 RF=1055M S=3.5f150ch40 A

WN80(B)-16 RF S=5RJ0-Mi6620RFj5102 H49 S