查询词典 concave

Compared with the electronic technique, laser engraving method has many benefits, one of the network of xuetie shape, laser engraving of the concave-there are many network point shapes such as alignment, Hexagon, square, round, pillow-shaped, and so on.

与电子雕镂法相比，激光雕镂法有许多优不面，其一，网穴轮廓的多变性，激光雕镂不凸版可以拔取多栽网穴轮廓，如六边形，不方形、线形、方形、枕形等各栽轮廓。

This paper presents an experimental study of the anti-misalignment stability and the output characteristics of the corner cube cavity laser compared with the piano-concave cavity and the plane-parallel cavity lasers.

对角隅腔激光器的输出特性和抗失调稳定性进行了研究，并与平凹腔和平平腔激光器进行了比较。

This article outlines the progress of ancient Chinese lenses from the Pre-Qin Period to the Five Dynasties, and discusses mainly two arguments: First, the"yangsui" recorded and narrated in Lun Heng by Wang Chong of Eastern Han Dynasty may be a plano-convex glass lens; secondly, the"four mirrors" recorded and narrated in Tanzi Hua Shu by Tan Qiao of Southern Tang Dynasty may be a plano-convex lens, a biconvex lens, a transparent planeparallel plate and a concave-convex lens respectively, but what kind of tra...

本文概述了中国古代透镜从先秦到五代的发展进程，着重从古代文献和出土文物的研究出发，结合中国古代社会经济发展水平，论证了东汉王充《论衡》中记述的阳燧可能是玻璃平凸透镜；论证了南唐谭峭的《谭子化书》中记述的&四镜&可能是平凸透镜、双凸透镜、平光镜和凹凸透镜。作者认为《谭子化书》&四镜&段可能实际上是对中国古代透镜发展的阶段性总结。

A magnetic source and condenser for protecting a pipe, ionizing any fluid flowing therein, and ionizing any dissolved and suspended solids in such fluid, comprising:a magnetic source including a magnet having a pair of opposed planar major faces and a planar minor face extending between said major faces and perpendicular to said major faces,said magnet being charged so that one of said major faces is a south pole and the other of said major faces is a north pole,a magnetic condenser a pair of pole pieces, each of said pole pieces having a pair of opposed planar major faces, one of which is an inner major face and the other of which is an outer major face, the area of said inner major faces being equal to that of the major faces of said magnet, the area of said outer major face being larger than each of said major faces of said magnet,said pole pieces being positioned on opposite sides of said magnet such that said pole pieces sandwich said magnet, said inner major face of each pole piece is contiguous with and completely covers an entire major face of said magnet, and said outer major face of each pole piece faces away from said magnet,each pole piece having an integral foot extending perpendicularly to said inner major face of each pole piece such that said pole pieces have two respective integral feet which extend toward each other and are substantially coplanar, each foot having a distal and a proximal surface with respect to said magnet, each foot having an end which is spaced from the end of the opposite foot,said distal surface of each foot having a predetermined concave curvature which will conformingly mate with an outside surface of a pipe having a predetermined convex curvature,said proximal surface of each foot being contiguous with said minor face of said magnet

我要求： 1。一台磁性来源和冷凝器为保护管子，电离任何流体流动在其中，和电离任何被溶化的和暂停的固体在这样的流体里，包括：一个磁性来源包括磁铁有一对被反对的平面主要面孔和一张平面较小面孔延伸在前述主要面孔和垂线之间对前述主要面孔，前述磁铁被充电以便前述主要面孔的当中一个是南极并且其他前述主要面孔是北极，一台磁性冷凝器每对杆片断，每个前述杆片断有一对被反对的平面主要面孔，其中之一比每个是是一张外面主要面孔的一张内在主要面孔和其他，前述内在主要面孔区域是相等的与那前述磁铁，前述外面主要面孔区域的主要面孔大的前述磁铁的前述主要面孔，前述杆片断被安置在前述磁铁的反面这样，前述杆片断三明治认为磁铁，各个杆片断的前述内在主要面孔是接触的与和完全地包括前述磁铁的一张整个主要面孔，和各个杆片断面孔的前述外面主要面孔从前述磁铁，各个杆片断有一只缺一不可的脚垂直地延伸对各个杆片断的前述内在主要面孔这样，前述杆片断有延伸往彼此和极大地coplanar 的二各自缺一不可的英尺，各只脚有末端和接近表面谈到前述磁铁，各只脚有被间隔从相反脚的末端的末端，各只脚前述末端表面有与管子一个外表面conformingly 将联接有被预先决定的凸面曲度的被预先决定的凹面曲度，各只脚前述接近表面是接触的与前述磁铁的前述较小面孔

It is separated into three large vertical pilasters; three decorative horizontal band again it is divided into three parts, of which the bottom three concave openings.

它被壁柱纵向分隔为三大块；三条装饰带又将它横向划分为三部分，其中，最下面有三个内凹的门洞。

It was pilasters vertical separation of three large; 3 decorative horizontal band again it is divided into three parts, of which lowermost of three concave openings.

它被壁柱纵向分隔为三大块；三条装饰带又将它横向划分为三部分，其中，最下面有三个内凹的门洞。

Results: When the top shape of osteotomes was concave,displacement and tensile stress were the maximum at the maxillary sinus floor.

目前，在临床中，骨挤压器顶端形状分为凸形、平形和凹形3种，对于哪种形状的骨挤压器在窦底提升术中提升效率高，对窦底的损伤小，目前观点不一致。

The invention comprises a free-form surface prism with three optical surfaces, and a micro-image display; the free-form surface prism is made of plastic glass materials with the refractive index greater than 1; the three free-form optical surfaces are concave surfaces, which meet one of the three surface-type equations, and the location relationship of each surface meets three condition equations; the incident angle formed between the widest-field upper edge rays emitted by an LCD and the second free-form surface meets the total reflection conditions; and an image source element is an LCD of 0.61 or 0.59 inches.

本发明包含一个具有三个光学表面的自由曲面棱镜和一个微型图像显示器，自由曲面棱镜采用折射率大于1的塑料玻璃材料，自由曲面棱镜的三个自由曲面光学表面均为凹形面，它们应满足三个面型方程之一，并且各表面的位置关系应满足三个条件方程，由LCD发出的最大视场上边缘光线在第二自由曲面上的入射角应满足全反射条件，像源元件为0.61或0.59英寸的LCD。

The arc-shaped concave of the sunken part of the pillow, can effectively solidify the bone growth, and prevent the part of head resting on the pillow getting bald; The nek part is adjustable on height, and could avoid any damage to the infants' neck; the pillow wing is relatively high, it could save the infants' head from falling off the pillow; the top part is pearl cotton structured, and can be utilized in the infants' older ages.

枕头的凹部的弧形凹陷可以起到对孩子的头部骨骼定型的作用，有效预防枕秃的现象；鞍部可自由调整高度，有效保护孩子稚娕的颈椎免受伤害；翼部较高，配合鞍部和凹部防治孩子落枕；顶部是珍珠棉结构，可在孩子稍大时换用。

One of the wire-wound plates is a wooden carving with concave on both surfaces and has designs like water-lilies on surface.

一只木雕双凹形绕线板，雕有荷花等花纹；一只为竹制大元宝形绕线板，纳布鞋底时用来绕棉麻线。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。