GB/T 12459  弯头 DN 300-890EL.01=T21100

DN 300-8 90EL.01=T21100

WN 1-1/2"-300 LFM=18F0=120FF

PL50(B)-16 RF6RF5 RF�´700-

BL40-1500FMC=239lass60

wn500(b)-25 rf b=5060 rf

bl50-25FF5b(B)-16 RF S=6

WN100-150 RF S=4-6.4J

WN1/2"-1500 RF Sch8S=5.5/

so80(b)-16rf b=3-

bl250-25rf55BL50