concentric ring

Metal cock ring soft seat surface pressure to the bearing surfaces, such as the valve core and valve seat is concentric ring surface can be a double tight closure.

金属旋塞表面压向阀座环软支座表面，如阀芯和阀座环表面是同心的，就能得到双重严密的关闭。

Acoustic scattering from submerged double infinite concentric cylindrical shell insonified by incident plane wave is studied.

研究水下双层无限长圆柱壳体的声散射.

We built, with our hands, a set-up of particle sizer with an all-solid-state Nd: YAG laser replacing the more conventional large-frame He-He laser, and a linear CCD array instead of the traditional concentric semi-ring shaped photoelectric detector.

采用全固态倍频Nd：YAG激光器取代传统的He-Ne激光器作光源，以一维线阵CCD取代传统的同心环光电探测器作为光信号探测器，自行搭建起一套测量微粒粒径分布的光电实验装置。

The result of this experiment indicates two conclusions, one of which is that concentric annuluses appearing in PHB spherocrystal in orthogonal polarized light are as a result of difference in height of 200nm~ 500nm between growth steps by reason of step-like or auger-type growing of PHB spherocrystal.

结果发现：实验用的PHB球晶是台阶式生长或螺旋式生长，其生长台阶高度差在200nm~500nm之间；

The street plan of the city has evolved as a series of concentric rings.

该城市的街道平面图像一圈圈的同心圆环.

A binary GA is used in the study on the optimization design of thinned concentric ring antenna array and find a method to improve the efficiency of the optimization design of thinned concentric ring antenna array. 3.

采用了二进制编码的遗传算法，对同心圆环天线阵列的稀疏优化设计进行了研究，通过仿真发现了提高同心圆环阵列稀疏优化设计效率的方法。

Concentric ring pattern is investigated numerically with a Reaction-Diffusion equation, and the numerical results are compared with that in experiment.

利用反应扩散模型对同心圆环斑图进行了数值模拟，并与实验结果进行了对比。

Concentric nothingnesses swaddle my heart, a bell that never rings.

一层层同心的虚无是我心的襁褓, 裹着一口永不敲响的钟.

Accordingly, a whole series of concentric bright and dark rings will surround the central spot.

因此, 环绕着中央点将会有整整一系列同心亮环和暗环.