螺旋形的

Objective: To study the stress distribution of one segment type mono dowel implant with various length and diameter in alveolar bone.

目的 ：明确一段式单桩螺旋形种植牙的骨组织形态、硬度与应力的关系，指导种植体的设计与运用。

At last, the square Jacobian matrix of low-DOF serial robot is established using screw theory, and the condition of existing singularity is solved on this basis.

最后，应用螺旋理论的方法构建了少自由度串联机器人的雅克比方阵，并在此基础上求解了机构奇异位形存在的条件。

Patterns in Nature: Plants The leaves of a giant lobelia plant, photographed on Mount Kilimanjaro's Shira Plateau in Tanzania, spiral around the center.

植物在自然界的模式。这叶片是一棵巨大的半边莲属植物，照片在乞力马扎罗山的Shira。。坦桑尼亚高地，螺旋形围绕其中心。

The nightside sky is an infinite lattice of shining hairlines that interlock planetoids and track er ratic spirals of glowing gnats.

背阴面的天空是一个由闪耀的细线交织而成的广阔网络，串联着许多小行星以及牵引着许多以螺旋形轨迹漂浮着的细小物体。

Four nearby symbols as "spiral, snail, serpent, crossed box" remain unidentified, but could represent the four constellations bordering Ophiuchus in Earth's sky.

四附近的符号为"螺旋形，蜗牛，蛇，越过盒子"仍然不明，但可以代表4星座接壤的蛇夫座，在地球的天空。

Meanwhile, the step from astronomy to watchmaking can bemeasured in millimetres… This distinctive spiral-shaped galaxy has beenfaithfully reproduced on the silicium plate adorning the new QuantièmePerpétuel watch by DeWitt, an exceptional piece of miniaturisation calling forstate-of-the-art technology.

从天文学概念来到钟表制造领域，其测量单位变成了毫米级……这个形状与众不同的螺旋形星系，被忠实地呈现于采用最尖端技术打造的微型硅片上，用以装饰全新的万年历腕表。

In addition, the entrainment of the ambient crossflow fluid by the scarf vortex occurs in large part on the surface of the spiral roller structures of itself due to the presence of smaller and unorganized eddies.

此外，由于在其表面存在更小的无组织涡结构，scarf涡与横流流体之间的卷吸作用主要发生在scarf涡的螺旋形条带结构表面。

The black race hair is black brown or black wool crimped hair and small volution make, hair is rude shortly but crispatura's.

黑色人种的头发是黑褐色或黑色的羊毛卷发以及小螺旋形发，头发是短粗而卷缩的。

Flowers radially symmetric, bisexual or unisexual, hypogynous, perigynous, or epigynous; perianth cyclic, rarely spiral, in unisexual flowers remnants of opposite sex present or absent.

开花辐射对称，单性的两性或，，周位，上位的或；花被轮列，很少螺旋形，在单性花内有或无异性花的残余存。

Any of various tropical marine gastropod mollusks, especially of the genera Strombus and Cassis, having large, often brightly colored spiral shells and edible flesh.

海螺任一种热带海洋的腹足纲软体动物，尤指凤螺属和冠螺属动物，长有大的并且通常是亮色的螺旋形贝壳，肉可食用

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐