GB/T 12459  弯头 DN 800-Sch4090EL6 B=407u00a6/u6F

DN 800-Sch40 90EL6 B=407u00a6/u6F

wn50)-40 rf.06/1.0

wn450-600rfsch864041fRF/a0M1RF=706m130bF2.50-6 s=

pl25b-10rf0-150fm2.mp

WN250(B)-10 t1.6/168-3

wn15-600rjN16-1

WN 40(B)-16 RF S=1012-1.6M 60FM/21

pl450-2.5 rf hg/6

SO 100-900 RFFSF S=6RF

SO 250-2.