阿基米德

Archimedes in the mechanical aspects of the most outstanding achievements, these achievements mainly concentrated in the statics and hydrostatics regard.

阿基米德在力学方面的成绩最为突出，这些成就主要集中在静力学和流体静力学方面。

Archimedes' this experiment is the embryo of "hydrostatics".

阿基米德的这个实验，就是"静水力学"的胚胎。

Volume of various geometric figures, applied geometry to hydrostatics and

巧装置，如阿基米德螺旋泵，并发现了浮力定理

Archimedes did important work not only in geometry, but also in arithmetic, mechanics, and hydrostatics.

阿基米德是古希腊数学家、物理学家、天文学家。

In this paper,the formula of calculation of the axial profile of an involute helical gearis inferred.

本文推导出了渐开线斜齿圆柱齿轮轴向齿廓的计算公式，并在此基础上提出了用车削阿基米德蜗杆的方法车削渐开线蜗杆的新方法。

The list starts with Archimedes and Kepler, whose three laws of planetary motion were not, incidentally, called "laws" by either him or Newton.

这些定律的名单起始于阿基米德和开普勒，后者的行星三大运动定律可不是被他自己或牛顿偶然地称为"定律"的。

In the paper, on the basis of aggregation of previous studies, the development of optical technology and development trends at home and abroad are introduced, the principle of Fresnel lens is summarized. In accordance with its principle, circle equidistant steps Fresnel lens design is described. And on this basis, based on Fresnel design, also based on a continuous upward spiral of the plane curve concept, incidence surface and the backlight is set up to greet Archimedes - Fresnel lens design formula and the Second parabolic type Fresnel lens design formula, and on this basis, the advantages and disadvantages of the three designs is discussed.

本文在充分了解非球面光学技术在国内外的发展状况和趋势的基础上，同时从菲涅尔透镜的光学原理出发，并根据它的工作原理推导了圆环等距菲涅尔透镜的设计步骤，并在此基础上依据菲涅尔的设计思想，同时依据平面曲线的连续又呈螺旋的构思，推导出了迎光面和背光面阿基米德型菲涅尔透镜的设计公式和二次抛物面型菲涅尔透镜的设计公式，并在此基础上讨论了这三种设计各自的优缺点。

However, logarithmic spiral can be used to substitute for the Archimedes curve to solve such problems and guarantee the stability of cutter machinability .

传统的阿基米德螺线齿背的铲齿成形铣刀在重磨前刀面后，切削刃上各点的后角将发生变化，从而影响刀具切削性能的稳定。

Calculation and Analysis of the Contact Strength of Logarithmic Spiral Profile Connection

若改用对数螺线作为铣刀铲背曲线，则克服了阿基米德螺线的不足。

However, logarithmic spiral can be used to substitute for the Archimedes curve to solve such problems and guarantee the stability of cutter machinability.

若改用对数螺线作为铣刀铲背曲线，则克服了阿基米德螺线的不足。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。