Measuring the focal length of concave lens using collimator
利用准直管法测凹透镜的焦距
The graph of a concave function is always below its tangent.
一个凹函数的图象总在它的切线的下方。
The clearance between the joining surface to avoid out concave
交面之间隙以防外凹
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。
A plane with a concave blade for making moulding with beadwork.
有凹刃可以用珠缘来浇铸的刨子。
Concave Refractive Microlens Arrays Fabricated by Ion Beam Etching
凹折射微透镜阵列的离子束刻蚀制作
Focal length measurement of concave mirror by holographic grating.
全息光栅法测凹面反射镜焦距
Study on the Stretching Process for Square Blank with Concave Anvil
凹面砧方坯拔长研究
Calculation for concave part of self unloading ship bottom conveyer
自卸船底舱皮带输送机凹弧段计算
Composite roller surface is longitudinal streak, concave band noise.
复合辊表面有纵向条痕, 凹纹。
A first concave part is formed on the top surface of the base plate.
该基板的该顶表面形成一第一凹 陷部。
A calibration method for gluing laser tube concave reflecting mirror.
贴片时激光管凹面反射镜的校准方法
The Manufacturing of Concave Aspheric Surface with Large Speed Aperture
大相对孔径凹非球面镜的加工
A second concave part is formed on the bottom surface of the base plate.
该基板的该底表面形成一第二凹陷部。
a concave molding with a cross section that approximates a quarter circle
截面近于九十度弧的凹线脚
The receiving materials shelf is designed into flat base or concave base.
接料架设计为平形底座的形式或凹形底座的形式。
A concave molding with a cross section that approximates a quarter circle.
飞檐的凹圆线脚截面近于九十度弧的凹线脚
Ovary constricted at base into a stipe, without concave nectaries at base.
子房缢缩的在基部成为一柄, 没有凹陷蜜穴在基部。
Measuring the focal length of a concave lens with the method of reflection
反射法测凹透镜焦距
In adults its contour may be straight, slightly concave or slightly convex.
成人肺其形状可以是直的，轻微凹下或轻度突出。
This paper describes a diverging fibre that is analogous to a concave lens.
本文讨论一种发散型光学纤维，它类似于凹透镜。
Study on surface modification and coating of concave printing golden powder
凹印金粉的表面涂覆与改性研究
The convective cloud cluster occurre in concave boundary of the comma cloud.
对流云团发生在逗点云系的凹边界。
The first part is the cavity, which gives a concave part its external shape.
第一部分是腔，从外形上看，它提供了一个凹的形状。
Upper sepal navicular, with a beak, lower margin slightly concave, ca.1.8 cm.
上部萼片舟形，具一具喙，下缘稍凹，约1。8厘米。
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