Investigation of Hydroforming Thin-walled Y-shaped Three-way Tubes and Effects of Axial Feed Ratio 薄壁Y型三通管内高压成形及补料比的影响
Influence of internal pressure on hydroforming of Y-shaped tubes 内压对Y型三通管内高压成形影响研究
This paper describes the preparation and properties of AIN_xO_y solar energy selectively absorbing films for vacuum collecting tubes. 叙述真空管集热器用的太阳能高温选择性吸收膜氮氧化铝(AlNxOy)的制备及性能。
Clamping of the T/ Y tubes 10~ 12 days postoperatively resulted in a much lower blood ET positive rate as compared with that before operation as well as before clamping ( P < 0.001); 术后10~12d夹闭T/Y管后ET阳性率明显低于术前和夹管前(P<0.001);