工作介质

But the working condition of the screw pump is so rigorous that the ordinary rubber could not fulfill the requirement of the terrible working condition such as high temperature,high pressure,long working hours,corrodent,seasonal stress and so on.

但采油螺杆泵工作条件十分苛刻，如高温、高压、工作时间长、磨蚀性介质、周期性挤压力等等，传统的定子橡胶已临近其性能极限。本文主要讨论纳米CaCO3和PVC树脂对丁腈橡胶的改性效果，综合提高丁腈橡胶的强度、耐油、耐磨等性能，通过改性使得丁腈橡胶能够满足采油螺杆泵定子材料的性能要求。

In terms of valves, the pipeline complexity of the work of weather conditions; oil, natural gas and oil, water and other media in the hydrogen sulfide, carbon dioxide and some organic acids appear to increase the destructive force of the metal surface, which rapidly lost their ability to work.

对阀门而言，其管道工作气候条件的复杂；石油、天然气和油层水等介质中硫化氢、二氧化碳和某些有机酸的出现使其金属表面的破坏力增大，从而迅速失去工作能力。

On the valve, the work of its pipeline complex climatic conditions; oil, natural gas and oil water medium hydrogen sulfide, carbon dioxide and some organic acids appear to increase the destructive power of the metal surface, which quickly lose their ability to work.

对阀门而言，其管道工作气候条件的复杂；石油、天然气和油层水等介质中硫化氢、二氧化碳和某些有机酸的出现使其金属表面的破坏力增大，从而迅速失去工作能力。

In order to suppress the heat effect of blue laser using plano concave cavity when working ,use Thermal Energy Converter to cont rol the temperature of gain medium Nd : YAG crystal and SHG LBO crystal.

为了解决平凹腔蓝光固体激光器晶体在工作中因热效应问题产生的影响，针对激光的增益介质Nd：YAG晶体和用以倍频的LBO晶体，采用半导体制冷器准确控制其工作时的温度。

The paper introduces PLL with elaborating its principal, the filter of the loop and the theories of noise. In the following chapter, some binds of dielectric resonator oscillators, especially, their operational principle, are introduced. And then the paper expatiates the design, emulation and the implementation of hardware of the DRVCO in this task, and the design and debugging of the PLL.

本文先介绍了锁相环，对它的的工作原理，环路滤波器的设计及噪声理论进行了阐述，然后介绍了振荡器的工作原理，分类和噪声；并在此基础上介绍了一些常见结构的介质谐振器稳频振荡器的工作原理，接着详细论述了本课题中DRVCO的设计、仿真和硬件实现，以及锁相环路的设计和调试，以及在调试中对低相噪的实现所进行的研究，并给出了结论。

Media Help Everyday we are exposed to the steam often divided into two, one, the boiler steam - saturated steam 2, thermal power plants out of steam - superheated steam 1, a relatively stable temperature and pressure saturated steam, temperature lower than 250 ℃, working pressure lower than 1.6Mpa 2, superheated steam temperature and pressure changes of a high base temperature up to 400 ℃, working pressure is lower than 4.0Mpa For the first steam, we usually use soft sealing steam solenoid valve as follows: Structural characteristics This valve is a valve and Balance valves main valve by the two vice components with the second open valve Pilot solenoid valve Heat: electromagnetic part, some with special high temperature seals and sealing materials, electrical materials, and apply a variety of insulation measures Wear: selection and reasonable Globe Valves guidance suite valve cup and clever use of fluid lubrication, reduce wear, increase life expectancy Resistance to condensation: condensation of steam pipeline valve on the steam water is an important factor in action, the valve will not affect the condensation water Other uses - soft sealing steam solenoid valve This series solenoid valve can Safety valves be widely used in textile, printing, chemicals, plastics, rubber, pharmaceutical, food, building materials, machinery, electronics, surface treatment and research sectors and bathroom, dining room, air conditioning automatic control system.

介质说明日常生活中我们接触到的蒸汽常分为两种，1、锅炉蒸汽-饱和蒸汽 2、热电厂出来的蒸汽-过热蒸汽 1、饱和蒸汽温度压力相对稳定，电动阀门执行器温度低于250℃，工作压力低于1.6Mpa 2、过热蒸汽温度压力变化基数较大温度最高可达400℃以上，工作压力则低于4.0Mpa 对于第一种蒸汽，我们通常会选用氧气专用阀、铜阀门软密封的蒸汽电磁阀如下：结构特点本阀是由副阀和主阀两大部件构成的先导式二次开阀的电磁阀耐热：电磁部分、密封件部分用特种耐高温电工材料和密封材料，并应用了各种隔热措施耐磨：选材合理，电站阀门阀杯和导向套间巧妙地利用流体的润滑作用，减少磨损，提高寿命耐冷凝：蒸汽管道的冷凝水是影响蒸汽电磁阀动作的重要因素，本阀则不受冷凝水影响其他用途-软密封蒸汽电磁阀本系列电磁阀还可广泛地应用平衡阀纺织、印刷、化工、塑料、橡胶、制药、食品、建材、机械、电器、表面处理和科研部门以及浴室、食堂、空调等自控系统。

The effed Of three-dimensional perturbed velocities and three-dimensional perturbed current densities on the beam-wave interaction of plasma-filled dielectric Cherenkov maser is analysed by use of the self-consistent linear field theory without considering the effect Of the longitudinal guided magnetic field.The dispersion relation and the Simultaneous condition of the beam-wave interaction are derived. It is clearly shown that the instability of the interaction results from the coupling of the TM mode in t...

在无引导磁场的作用下，利用自洽线性场理论，分析了电子的三维扰动速度和三维扰动电流密度对填充等离子体的介质切伦可夫脉塞注波互作用的影响，导出了注波互作用的色散关系和同步条件，所得关系清楚地表明，其工作用不稳定性是由填充等离子体的介质筒慢波波导中的TM模与电子注模通过电子注耦合所致，并求得了电子注引起的频偏和波的增长率。

In addition to extending through the valve cover, so that the temperature packing medium temperature of the long neck away from the valve cap, the can increase heat or heat-absorbing film, made with heat, or heat-absorbing film of long-necked type valve cover to medium temperature is reduced or increased.

除了通过把阀盖延伸，使填料处温度远离介质工作温度的长颈型阀盖外，也可增加散热或吸热片，制成带散热或吸热片的长颈型阀盖，使介质温度得到降低或提高。

This program can be used to obtain the true and high-resolved spectra by means of techniques of inverse Fourier convolution and nonlinear least squares fitting.

论文工作主要由三部分组成，一是编制了用于光谱数据和光谱图象处理以及等离子体参数诊断的程序包—ESDAP，为精密实验数据分析提供了可靠手段和得力工具；二是对X射线激光增益介质的物理特性和规律进行了实验研究；三是在对X射线激光增益介质研究的基础上，依据现有的实验条件，主要通过靶设计探索了提高复合泵浦X射线激光增益的新途径。

However, if auto-negotiation is disabled or not supported, the duplex must be set by auto-detection or manually on both the switch port and the device to prevent duplex mismatch, a common cause of problems with Ethernet (the device set to half-duplex will report late collision s and the device set to full-duplex will report runts).

交换网络典型的使用星型拓扑，尽管设备工作在半双工模式是仍然是共享介质的多结点网。10BASE-T 和以后的标准是全双工以太网，不再是共享介质系统。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。