GB/T 12459  弯头 DN 580-Ⅱ-545ELELL=22 Sch

DN 580-Ⅱ-5 45ELELL=22 Sch

47023 FM700-4.0 δ=70

WN300-150 RF SC6rf'S=

PL450-10RFc

BI 14000n

WN50(B)-40RF(B)-16RF7 δ0=

bl125-16 rf c=212/RF S 205

WN150(B)-600 RF SCH120Smpampampa

pl 25(B)-16 rf B=0RF00-300 RF/-1

WN 150(B)-16 RFu00u00 H1=12HG/506FM