色泽是反射和衍射的综合效果.Lustre is the integral effect of reflection and diffraction.在这种情况下,据说,波发生了衍射.In this case the wave is said to have been diffracted.显然,衍射以及干涉是波特性.Evidently diffraction, as well as interference, is a wave pro...
无芯棒拔制是冷拔钢管生产中应用最广泛的一种生产方法.Non - mandrel drawing is a method widely used in cold drawn pipe production.介绍了一种分析牛角芯棒上热推弯管成形过程的实验解析法.Introduce an experimental analytics axis - thrust tube bending on horn mandrel.提出了小型无缝钢管生产机...