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| 21. | On the basis of the principle of magnetic fluid seals the paper has resolved the handicap of seals arising from the wiggle of high speed shaft. |
| 利用磁流体密封原理可解决因轴高速旋转摆动带来的密封困难问题。 |
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| 22. | application of biological principals to the study and design of engineering systems (especially electronic systems). |
| 利用生物学原理对工程系统（尤其是电子系统）的研究与设计。 |
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| 23. | complementarity principle |
| 附加性原理|补充性原理|辅助性原理|互补原理 |
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| 24. | To discuss this wave aspect, it is useful to invoke a form of the correspondence principle. |
| 为讨论这个波动性质，利用对应原理的一种形式是有好处的。 |
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| 25. | principle of superposition |
| 叠加原理；层序原理 |
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| 26. | comparative principle of satisfying needs |
| 满足需要比较原理;满足需要可比原理 |
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| 27. | combination principle |
| 并合原理|组合原理|化合原理 |
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| 28. | Based on the principle of dividing with pitch change gear, this paper deduces the formula of arbitrary dividing in screw grinder. |
| 利用螺距挂轮分度的原理,推导出在螺纹磨床任意分度的公式。 |
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| 29. | principle of argument |
| 辐角原理;幅角原理 |
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| 30. | A series of calculating equations of reliability indices on heat? supply system component are presented with the maximum entropy principle. |
| 利用最大熵原理,推导出一系列供热系统元部件可靠性指标的计算公式。 |
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