GB/T 12459  同心异径管 DN 200×150-Sch10SRC δ=5.6 S=3f

DN 200×150-Sch10S RC δ=5.6 S=3f

WN 20-600 RJ Sch800S2.280-90-1.6f00-53=43

WN80(B)-16RF/SS=710/2 a=7rf/st0S05(B30 î

SO150-16RF b=26

SO15-600RFch RF f=1.6 O=4=117RF80s rfM410RF. R31b)-1/170

WN150(B)-150 FFRF/ RFwn60RF-A1

SP-1 DN=800 δ=10 S

SO350(B)