In this paper, we study the technique of cold extruding forming, and produced all kinds of the long conicalpipe in that way.
采用冷挤压成形工艺方法，能生产出各种尺寸、规格的深圆锥形管件。
2
To avoid slip of CFRP bars, the friction angle between soft metal pipe and CFRP bars should be larger than the sum of barrel's conical angle and friction angle between wedge and barrel.
为保证碳筋不出现滑移，软金属管和碳筋间的摩阻角应大于锚环锥角和夹片与锚环之间的摩阻角之和；
3
In this paper, a conical swirl-proof device is proposed to prevent eddy and flow separation in the water - inhaling pipe of the pump.