口的

By using unstructured dynamic grid based on local remeshing method, the variation of grid caused by projectile movement was analyzed. Numerical computation results of gun muzzle flow field which arranged in time was obtained. The creation process of the complex flow field of gun muzzle was described. The numerical simulation of flow field including moving projectile was achieved.

采用基于局部网格重构法的非结构动网格技术处理弹丸运动造成的网格变化，给出一系列按时间顺序排列的膛口流场数值计算结果，描述了复杂的膛口流场形成发展过程，实现了含运动弹丸的膛口流场的数值模拟。

Its work is the process of spraying by the pulp put out the warehouse I expected or high water concentration pulper, as well as the initial concentration of the pulp slurry into the mouth of the double helix squeeze machine feed the population through the right and left of the screw shaft Reverse spin, by the end of the pulp to be on the other side.

其工作过程是纸浆由喷放仓的出料口或高浓水力碎浆机的以及经初步浓缩的浆料出浆口进入该双螺旋挤浆机的进料口，通过左、右螺旋轴的反向旋转，纸浆由一端被推向另一端。

After analyzing the ingredient of the imported exothermic/insulating riser sleeve, three sorts of commonly used sylvite oxidizers was selected and the influence of their mixture ratio on the ignition time, exothermic duration and the exothermic power of the riser sleeve was investigated.

由于氧化剂对发热保温冒口套的发热性能有着决定性的影响，笔者在分析了进口商业用发热保温冒口套组成的基础上，选择了三种钾盐氧化剂，研究了这些钾盐氧化剂不同加入量对发热保温冒口套的点燃时间、发热持续时间及发热功率的影响。

Before unloading of cement, a key step is the position calibration of the comment loading and camion. Its target is to eliminate the position errors between the center of the comment loading head and the center of the vision area so as to unload accurately.

混凝土装载机进行成品料卸料前的出料口位置视觉校准是进行混凝土装载的重要的一步，目的是通过计算机视觉系统，保证处于空间位置的出料口中心和处于固定位置的运输车装料口中心重合。

Based on situation of teaching and learning of coreless transformer and structure study of coreless transformer,the equivalent circuit of coreless transform based on CCVS is constructed.

结合空心变压器的电气分析在教学中的特点，分析了空心变压器的基本结构和基本特点，运用电流控制电压源 CCVS对之进行了等效变换，然后将空心变压器的输入电路和输出电路看成一端口，运用戴维南定理分别对其输入端口和输出端口等效成一个电压源与一个电阻的串联形式，并进行了详细的讨论

Here, we have pioneered the SINEs study in cyprinidae family based on the above questions, the results following:1 In this study, we firstly apply the inverse PCR protocol for isolating the SINEs from Opsariichthys bidens genome on the basis of A-B PCR.

马口鱼的基因组DNA利用HaeIII酶切后，利用T4连接酶进行自环化；环化后的DNA分子在反向引物的引导下执行反向PCR，最后，一组衍生于tRNA的SINEs从马口鱼基因组内获得，并根据马口鱼的学名Opsariichthy bidens命名为Opsar。

FMDV usually causes persistent infection or inapparent infection that can also occur in vaccinated animals following contact with the virus,which will influence the diagnostic techniques and the preventive measures that need to be taken.

口蹄疫病毒是小RNA病毒科口蹄疫病毒属的成员，该病毒感染动物尤其是反刍动物以后，会形成无症状的持续性感染或隐性感染，注射疫苗的动物当再次接触新病毒时，也会成为隐性带毒者，从而给口蹄疫的诊断和防制带来严重的影响。

By using a certain structure,the slip power can be feed backed through magnetical field.So the slip rings and brushes of the conventional EVT can be omitted,it will bring high reliability and less maintainability.

本结构较双机械端口电机的优点在于：无刷双馈双机械端口电机通过一定的电机结构，用磁场完成转差功率的回馈，取消了双机械端口电机中的滑环和电刷，增强了电机的稳定性，减少了维护工作。

3 AC motor 15kw 1/set 1.4 Speed regulator 15kw 1/set 1.5 Detailed requirement:--thermal treatment and quench for gear surface Feeding base 6 Auto feeder --mode vacuum suction model 7 Dry with hopper type --mode auto control temp.hot wind for heating --mode AC motor 2、Composite die head with changeable core and mouth mould ф11~ф32mm one unit moule --mode spiral type,with changeable mouth moule and core moule --heating control zone stainless steel heating ring --power Each set for changeable calibrator、mouth moule and core rod

1.3交流电动机十五千瓦1/set 1.4调速器一十五千瓦1/set 1.5详细的要求：-热处理和淬火齿轮表面喂养基地 6 ）自动接驳-模式真空吸管模型 7 ）干燥，漏斗型-模式的自动化控制t emp.hot风加热-模式交流电动机 2 ，复合模头与复杂多变的核心和口模ф11 ф32毫米一个单位moule -模式，螺旋型，与复杂多变的口m oule和核心m oule -暖气管制区不锈钢暖气响动-电源每套为复杂多变的校准，口moule和核心杆

The results show that the gas flow is represented as laminar flow in flat nozzle contour and turbulent flow in scraggling nozzle contour; The development of turbulent flow is good for the control effect of super-sound velocity gas flow and the dielectric strength recovery properties.

光滑喷口壁面吹弧气体的流动表现为层流；凸凹不平的喷口壁面吹弧气体的流动表现为湍流；对存在有湍流的不同喷口，湍流发展得越充分，越有利于控制超音速流的发展，从而有利于提高介质强度恢复速度。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。