The traditional method of drawing forming the cylinder possessed vertical slotwas defective．Once drawing forming wasadopted．The shape and dimension of blank were got by means of tests as well as calculations.

针对传境拉深带纵向槽筒形件的方法的缺点,采用一次拉深成形的方法,并通过试验和计算获得毛坯的形状和尺寸。

This paper describes the research advance in enhanced condensation heat transfer on the wave shape bend surface fluted tube, vertical cosine grooved tube, V shape longitudinal grooved tube, vertical plain tube with longitudinal wire, ver.

为此 ,对波形曲面凹槽管、垂直余弦形沟槽管、V形纵槽管、垂直光管设置纵向金属丝、立式螺旋槽管和小螺旋角的内外螺旋三角翅片管在强化冷凝换热方面研究的进展作了概述 ,并介绍了制备低表面能合金材料以实现稳定滴状冷凝的冷凝换热强化新技术。