压下的

It is proved that the presented system realizes the high efficiency and accurate control of the screwdown mechanism of the pilger seamless tube mill.

生产实践表明，该控制系统实现了对周期轧管机压下装置高效、准确的控制。

Numerical simulations were done for a bistable latch valve of the system by FLUENT, and three groups of datum for different fluids were obtained with the same effective exit sectional area. Besides, a static mathematic model for the electromagnetic valve was established based on the obtained datum. Secondly, the motion of the valve spool was realized by UDF file in FLUENT. Three kinds of motions, uniform, acceleration and motion driven by the coupling effect of the liquid resistance and the electromagnetic force, were calculated and compared. The dynamic characteristic of the electromagnetic valve was obtained by analyzing the relationship of the mass flow rate of the inside flow field of the electromagnetic valve, the change of the drop pressure of the passageway of the valve, and motion time.

并针对系统中的某双稳态电磁阀，使用商用CFD软件FLUENT对其进行内部流场的数值模拟，通过使用不同流体介质，不改变阀门有效出口截面积的情况下，分析得到的三组数据，建立了该电磁阀的静态数学模型；通过编写UDF文件，实现对阀芯运动方程的控制，在阀门做由闭合到开启、开启到闭合运动时，控制阀芯分别做匀速运动、匀加速运动以及阀芯受到液体阻力与电磁力作用力的耦合力的运动，分析了三种工况下电磁阀内部流场质量流率和阀门出口入口压降的变化以及运动时间，从而得到该电磁阀的动态特性。

3In justified cases and on request by GL Wind, the fibre content of the compone

在对部件验证时以及GL Wind 要求下，为得出层压工作的结论，部件纤维含量将由

Stress distri-bution of laminated compos ite shell subjected to impact load［J］.

层压复合壳在冲击荷载作用下的应力分布［J］。

The depressible member has an outer end which is also accessible along the outer surface of the toothbrush body.

可压下元件具有一个外端，其也可沿着牙刷主体的外表面接触。

The positionable member defines an aperture extending through its midsection within which is disposed a depressible member.

可定位元件限定一个贯穿其中央部分的孔，在其内部设置一个可压下元件。

Upon pressing the depressible member, the cam member and spring are urged against an electrical circuit provided within the body of the toothbrush which is used to selectively operate a motor and drive mechanism to move one or more sets of bristles.

当按压可压下元件时，推动凸轮元件和弹簧顶靠设置在牙刷主体内的电路，其用来有选择地操作一个马达和传动机构以移动一簇或多簇刷毛。

By using some simplification assumptions,a theoretical analysis of the local rolling forming load for the discal parts is presented.

在某些简化假设条件下，对盘型件局部辗压成形的载荷及其影响因素进行了理论分析。

It is indicated that ductibility and damage resistance of concrete materials increase under passive confining pressure.

结果表明：混凝土材料在被动围压下，延性、抗破坏能力得到加强，具有明显的增强效应。

Compress after impact of glass-fiber woven reinforcement epoxy laminates was investigated experimentally at room temperature and hygrothermal environment.

实验研究了二维编织环氧树脂基玻璃纤维复合材料层压板在室温和湿热条件下的冲击后压缩性能。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。