GB/T 12459  弯头 DN 32-Sch4090ELFf b10rf==416 RF2w

DN 32-Sch40 90ELFf b10rf==416 RF2w

DN 350×200-Ⅱ-6 RC0 RF Sch8���

WN400(B)-16 RF2Sch80RJ0SM0 RF/ dRF@A 1

SO 20(B)-16 RFch6RFh(b)-160

WN80B)-300RF00H=RF150hg

BL 20-100 RF77ampampwd=&

bl50(b)-1500rj/Sch80M352-1ch

20592 WN 100-25 RF S=10

DN300-