GB/T 12459  弯头 DN 200-Sch3090ELh40 kF

DN 200-Sch30 90ELh40 kF

Sw20-150 RFhgcad.411mmR5 wn4

PL40B-10RF30RF0--16 RFFÃâfm900-1.6=5-1=3-2.5/wp-co

WN 650-16 RF

So200(B)-300RF

wn50(a)-40 m s=4.5B=0(b)-16rf sR92S160

47023 RF700-1.0H=216014RF

wn250-25 t4.0050-soF C-2ذ–â€

so 150(B)-25 m