GB/T 12459  弯头 DN 100-Sch4090EL600

DN100-Sch40 90EL600

SO350-150RFc r50 RFF8f/@4

2 FF 500-1.6rf4Sc21

PL 250(B)-25 RFam0J

3 M 500-1.6FSc

PL250(B)-25ff16M0

WN200-600FM554-hK

WN200A-63rj S

WN 2"-150 RF Sch402

pl 50(b)-10 rf 304.6F-2-0.6rj00-1/f1000-100-16rf58-6.4-16rrf6-0 R δs=512