查询词典 plane concave

One slightly concave cylindrical lens combination is used to change one laser beam into small sector in small angle, and one reflector projects the laser beam to prism driven by a motor to rotate in high speed to produce one reciprocating and scanning small sector plane.

采用微凹柱面透镜组将激光光源发射的一束激光拉成具有微小夹角的小扇面，利用反射镜将此激光束透射到由电机驱动的高速旋转多面棱体上，使激光束产生一个小扇形往复激光扫描光平面。

The beam sizes reflected from the concave mirror and the plane mirror are 48 mm and 5.1 mm,respectively.

得到由凹面镜和平面镜反射回来的光斑直径分别为4.8 mm和5.1 mm，平凹腔的角度对准精度达到了3.18′。

As early as 400 BC for many years, China's "Mojing" documented book on the forward line of light, light reflection, as well as the plane mirror, concave mirror, convex imaging phenomenon.

早在公元前四百多年，我国的《墨经》一书就详细记载了光的直线前进、光的反射，以及平面镜、凹面镜、凸面镜的成像现象。

Two different Fabry-Perot cavities have been adopted: plane mirror cavity and confocal concave spherical mirror cavity.

采用了两种不同的Fabry-Perot腔体结构：平面腔镜结构和对称共焦球面腔镜结构；首先进行了理论分析，得出两种结构中折射率变化与干涉条纹变化的关系，然后分别对两种腔体结构下的测量系统进行实验研究，都可以探测到10-5量级的折射率变化量，结果基本令人满意。

You create a slightly concave, circular plane of force that follows you about and carries loads for you.

你可以制造一个平滑的盘状力场。它会跟随你并帮你搬运东西。

One is concave whereas the other is convex and faces the longitudinal plane of symmetry X.

一个是凹入的，而另一个是凸起的，并面向纵向对称面X。

"F" is the distance between point P' and the tangent to the concave area in the maximum point of concavity measured in projection view on the plane of symmetry Y.

"f"为在对称面Y上的投影视图上测量的点P'和最大凹状点上的对凹入区域的切线之间的距离。

The problems of point - line - plane - volume; the facts of square - circle - triangle; the mysteries of central - peripheral - frontal - oblique - concave - convex; the right angle and perpendicular; of scale and position; the interest in post- lintel, wall-slab, vertical-horizontal; the arguments of two-dimensional and three-dimensional space; the extent of a limited field; the meaning of implied extension; the meaning of plan, of section, of spatial expansion - spatial contraction - spatial compression - spatial tension; the direction of regulating lines, of grids; the relationships of figure to ground, or number to proportion, of measurement to scale, of symmetry to asymmetry, of diamond to diagonal; the hidden forces, the ideas of configuration; the static, the dynamic: all these begin to take on the form of a vocabulary.

点-线-面-体的课题；正方形-圆形-三角形的事实；中央-边缘-正对-倾斜-凹入-凸出的奥秘；直角与垂直；尺度与位置；柱-梁、墙-板、竖直-水平的旨趣；两维与三维空间的思辩；局促场所的极限；暗示延伸的含意；平面、剖面、空间扩充-空间收缩-空间挤压-空间张拉的意义；控制线与网格的方向；图与底、数字与比例、尺寸与尺度、对称与非对称、菱形与对角线的关系；暗藏的力量、构型的想法；静态、动态━这一切都将发展成为语汇的形式。

Seed subterete in cross section, face plane or slightly concave.

种子近圆柱状的在横断面上，表面平面或稍凹。

A polyhedron some of whose plane sections are concave ''.

有些平面部分是凹型多边形的多面体。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。