extraterrestrial是什么意思

网络释义

用法例句

Dynamic Test of Contact Tooth Pair Numbers of the N Type Involute Planetary Transmission with Minor Tooth Difference;

N型渐开线少齿差行星传动接触齿对数的动态实测

Correlation between spin angular momentums and background angular momentums of planets;

行星自旋角动量和背景角动量之间的相关性

Proving Keippler s 3 Laws of Planetary Motion;

开普勒行星运动三定律证明

By means of the Runge -Lenz s vector the problems of the planets motion around the sun are solved in classical and relativistic cases.

本文讨论了Runge－Lenz矢量的性质，并利用它求解经典情况下和狭义相对论情况下的行星绕日问题。

The whole field of planetary gear transmission is dealt -with.

(?)里基本上涉及了渐开线行星齿轮传动的整个领域。

The efficiency of planetary gear trains is discussed.

这里对NGW型行星齿轮机构的啮合效率进行了研究。

Comparing many types of transmission,this paper chooses the multiple-level planetary gear transmission to meet the transmission ratio conditions.

首先分析了增速机构设计在履带车辆电磁悬挂设计中的作用,通过选择增速机构的传动方案,得到了满足传动比条件的多级行星传动。

The relation between the radial deformation of the central internal gear in planetary gear transmission and the number of planet gears is derived in this paper.

导出了行星传动中的内啮合中心轮齿圈径向变形与行星轮数目之间的关系，并指出：从提高内啮合中心轮齿圈的柔度出发，行星轮数目应选择荐用范围的下限。

In this paper, the main constraints for the designing of NN type of involute planetary gear transmission are discussed, a concise and practical method for determining the addendum modification coefficients is proposed and some appropriate parameters are provided.

对NN型行星传动的主要限制条件进行了讨论，提供了一种简明实用的变位系数确定方法，推荐了参数选用

The frameworking planetary carrier in the planet-gear retarder has been considered as a whole with the glue command of the finite-element analysis software-ANSYS,and though the structure static analysing,the distribution of the deformation and stress of planetary carrier has been obtained.

应用有限元分析软件ANSYS,通过粘接命令将行星减速器中的侧板可拆卸式行星架组件看成一个整体,对其进行结构静力分析,获得了行星架组件的变形及应力分布。

for thin coal bed with iron ore and analyze the planetary carrier with this method.

文章以某煤机公司设计的含硫化铁结核的薄煤层采煤机摇臂减速系统的行星架为研究对象,阐述了一种对承受复杂的未知载荷的柔性件进行可靠性研究的新方法,得出了行星架在采煤机滚筒截齿遇到硬结核时刻的受力及变形情况,并详细阐述了仿真过程中应注意的问题和相应问题的解决方案,为改进设计提供了重要的参考信息,并对柔性件(行星架等)进行了优化;为刚柔耦合系统中未知载荷构件的研究提供了一条有效途径,使复杂煤层赋存条件下的薄煤层采煤机的设计及应用成为可能。