GB/T 12459  弯头 DN 20-Ⅱ-390EL RF

DN 20-Ⅱ-3 90EL RF

WN50-150 RF6Р 00 RFcF â…،amRF005(B)-00 FMRF@RF@

pl200(a)-16 t HG

WN500-1500 RJ Sc

2 A6ذ �

SO 1 1/2"-300 RFcF â…،amRF005(B)-00 FMRF@RF@

SO150-300 M R0.

SO 125(B)-300 RFRF.flange

DN350/PN10/02&32A96 R

so50a-16ffhu