Linear deformation zone of generating wall can be obtained by means of non-linear cone Angle plug combined with the barrel-shaped rolls, so the wall accuracy can be increased greatly.
采用带有非线性顶头锥角的顶头与桶形辊相配合可以获得线性的成壁变形区，从而大大提高壁厚精度。
Plug under the autumn scenery, Hengyang go without attention. From all sides of the sound from the angle. The thousand peaks in the sunset in the closed.
塞下秋来风景异，衡阳雁去无留意。四面边声连角起。千嶂里，长烟落日孤城闭。
Machining the spark plug hole and counter bore at a compound Angle.
加工火花塞孔与反孔的复合角度。
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