查询词典 concave mirror

In this study, a commercial CAD/CAM Software is used to plan and generate the multi-axis tool path, and a table rotating/tilting type five-axis machining center is used to perform the experimental machining operation. The material of the die studied is NAK 80 die tool steel, and the geometries are modeled as concave and convex spherical surfaces. Milling parameters considered are spindle speed, feed rate, and different types of cutting tool path. The experimental results show that the surface roughness for concave spherical surface is about 0.247 μm and roundness is about 0.0283 mm and the surface roughness for convex spherical surface is about 0.250 μm and spherical roundness is about 0.0551 mm under the cutting conditions mentioned in this study.

本研究的实验方法与步骤包括利用商用CAD/CAM系统针对实验对象规划三轴/五轴同动加工路径，并经后处理程式转换，在本实验室之平台倾斜/旋转型之五轴加工机上进行实验，实验对象为NAK80模具钢材料之凹与凸球形曲面之加工，此外考虑的切削条件有主轴转速、进给速度、加工路径等，在本研究所设定之最佳切削条件下，凹球形曲面之真圆度约为0.0283 mm，粗糙度为0.247 μm，而在相同切削条件下，凸球形曲面之真圆度为0.0551 mm，粗糙度为0.250 μm。

His figure looks very funny in the concave mirror .

他的样子在凹镜里显得非常可笑。

A concave parabolic mirror with the diameter of 140 mm and the F number is 2 is tested by using this method.

利用该方法对一直径为140 mm，F数为2的凹形抛物面镜进行了测试实验。

We simulated the measurement of 420 mm concave mirror on computer.

通过计算机模拟方法，针对口径为420 mm的凹面镜进行了双探测器数据获取，梯度计算和面形重建。

His figure looks very funny in the concave mirror.

跟我来看看英语写作擂台期待你的加入喔

Temple of Hera before the concave mirror on the sun shining, it's a signal this will be a successful ignition ceremony.

赫拉神庙前的凹面镜上，阳光耀眼，预示着这将是一个圆满的点火仪式。

There is a small bulb placed at focus of a concave mirror.

可改成 凹面镜焦点处有一个小灯泡。

Large concave mirror produces image that is magnified by the eyepiece .

由目镜产生放大图像的大的凹透镜。

Cool Earth's insight was that if you coat only one half of a balloon, leaving the other transparent, the inner surface of the coated half will act as a concave mirror.

凉爽地球公司的设想是，如果你只镀气球的半面，保持另一半是透明的，有镀层的一半的内表面将起到一个凹透镜的作用。

Aberration of the concave mirror is reduced by a meniscus lens.

用半月板镜头减少凹透镜的过失。

The effective ingredients can be absorbed and utilized by targeting and double way penetrating, to effectively solve the balance of skin and insufficient nutrition, improve and reduce skin dryness, wrinkle, darkness, sallowness and aging problem, and display excellent healthy cosmetic effect.

产品有效成份通过靶向和双途径渗透，可充分被人体吸收和利用，能有效解决肌肤生态失衡、营养缺乏，改善和减轻皮肤干燥、皱纹、晦暗、黄萎、衰老等多种肌肤问题，发挥卓越的健康美容效能。

By 25 he had produced what many consider the most important result of 20th century mathematics: his famous "incompleteness theorem."

到了二十五岁，他提出著名的不完备定理，被许多人认为是二十世纪最伟大的数学成果。