GB/T 12459  弯头 DN 50-Ⅱ-590ELampampampampamH20ch80 RFRF00F

DN50-II-5 90ELampampampampamH20ch80 RFRF00F

PL100(B)-16 RFl0 RF�´0==401ceRvF0rf0-G5

bl50B-25RF S2786Rh-1Fn2 f1=2pwd500-1.6/h80s

Bl500-900 RJSch.6S

B WN 800-150 RF S=14RF/==3=5

4 B3FFFFRδ0-15

PL25-10 RF 45/62

DN 40×40×950-Sch80 TR

WN80(B)-16RF