叶轴

The engine used two rotating rectangular vanes A,B which were fixed to coaxial shafts, and rotated semi-independently.

发动机用了两个旋转矩形叶甲，乙，其中固定同轴槽，并旋转半独立。

The noise may come from the hard disk on its own vibration, this time on the issue is not only annoying noise that simple, but involves the safety of the hard disk.

而震动噪声一般是由于风扇叶不平衡，叶片在轴上松动以及轴承间隙过大造成的。

Based on the elastic theory of large deflection and by taking into account the variation of the axial force and its effects on bending deformation of the drillstring in vertical section ,the vibration of the drillstring induced by fluctuating weight on bit is described by a parametrically excited system.

基于弹性大变形理论，考虑到轴力沿钻柱轴线的变化及其对钻柱弯曲变形的影响等因素，将受自重作用的铅垂井段钻柱在波动钻压激励下的振动转化为一个参数激励系统，用 Galerkin方法首次得到了描述此系统的 Mathieu方程，并通过将方程的解展成富里叶级数的方法，得到了该振动系统的动力分岔值曲线及其所包围的动力不稳定区。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。