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In the paper,working principle and software, hardware design of new style net fire control system based on Rabbit2000 microprocessor are introduced.

介绍了以 Rabbit2 0 0 0微处理器为核心的新型网络消防报警控制系统的基本工作原理以及系统的软硬件设计。

Combined with the macro-morphology appearance analysis and working conditions of failure casing, the paper reached a conclusion that it is due to the impact and friction which come from the drill tools made the fatigue cracks formation on the casing thread root, and eventually leading to casing rupture failure, the material defects in failure casing accelerated crack initiation and growth.

摘 要：某井在钻井作业过程中，发生了上层Φ244.5 mm技术套管断裂失效事故，为了分析事故原因，对失效套管材料的化学成分、金相组织和力学性能进行了检测分析，结合套管失效形貌的宏观分析和套管使用过程中的现场工况分析，得出了套管螺纹发生断裂失效的原因是钻具对套管的撞击、摩擦，使套管螺纹根部产生疲劳裂纹，最终导致套管断裂失效，失效套管的材料缺陷加速了裂纹的萌生和扩展。

Aiming at the condition that the power of air conditioning in locomotive is especial, the cooling medium is mostly chemicals and the systems are complex, in this paper, a wholly fresh air scheme is brought up for air conditioning system in locomotive drive-cab on the basis of the intermittent working of the air compressor, taking high-pressure air as power source and combining compressed-air refrigeration technique and gas injection technique, without supplying external electric apparatus.

针对现有机车空调系统电源特殊、冷媒多为化学制剂、系统复杂的状况，利用机车制动系统空气压缩机间歇工作的特点，以高压空气为动力源，有机地结合压缩空气制冷技术和气体喷射技术，提出了一套无需外加电气设备、全新风的机车司机室空调系统方案，并介绍了该系统的设计方法和气体喷射器的设计过程，为进一步深入研究奠定了基础。

This paper discusses the working principle of semi-automatic processing of blind multiple keys with gear shaper , and points out the design points and manufacturing points.

论述了插齿机半自动加工盲孔花键的工作原理，并指出了设计要点和制造要点。

In this paper ,the anodic differential pulse voltammetry has been applied to the research of the electrochemical behaviour of biotin,with gold electrode as working electrode.In solution of HAc NaAc(pH 3.59),the peak potential of biotin is 0.46V.The calibration curve is linear over the concentration range of 1.0×10 -6 ～2 0×10 -5 mol/L.

用微分脉冲阳极伏安法研究了生物素的电化学行为，用金电极作工作电极，在pH3.59的HAc－NaAc介质中，生物素的峰电位为0.46V，生物素浓度在1.0×10－6～2.0×10－5mol／L范围内与峰高呈线性关系。

In this paper how to determine the working index of the oscillating grain pan was discussed through theoretic analysis and applying.

本文从理论分析和实践应用两个方面论述了如何正确地确定抖动板的工作体制。

In this paper the author introduces the component elements in marine heat-conducting oil boiler in detail,analyses the usual faults for such boiler with its working principle and puts forward ways to remove the faults.

文章对船用导热油锅炉的系统组成元件逐一进行了介绍，并结合导热油锅炉的工作原理对锅炉的常见故障进行分析并提出了排除故障的方法。

Heat transfer model was analyzed for polishing with ice fixed abrasives in this paper. With ANSYS finite element, the value of temperature fields for polishing was simulated. The temperature contour map of temperature field and the melting thickness values of working area of ice fixed abrasive tool were obtained. Polishing experiments were conducted with the same technological parameters.

本文分析了低温固结磨料抛光硅片的传热模型，并借助有限元软件ANSYS对热传导过程进行了仿真，获得了冰冻磨具在不同抛光时刻的温度场等温图及工作区域的融化厚度值。

Though bleakly portrayed, they still attract the reader's sympathy, not least for their precarious, ill-paid jobs and filthy working conditions (the office carpets not cleaned since 1977, according to the paper's lore).

作者的描写不带感情，但读者仍禁不住悲叹人物命运。他们做着岌岌可危，薪水微薄的工作，身处恶劣的环境（从报社史来看，办公室的地毯自1977年就没再清洗过），更是引人同情。

Therefore the use of electronic current transducer as the measure unit of distance protection is suggested in this paper. The working principles and characteristics of electronic current transducer are introduced. Then the improvement on the starting component, phase selecting component, impedance component and other functional component of distance protection by using of optical current transducer is discussed afterward.

因此该文提出了采用电子式电流互感器作为距离保护的测量元件的建议，论证了采用光学电流互感器对距离保护起动元件、选相元件、阻抗元件及其他功能元件等带来的优越性。

It is also known as one of the most poisonous naturally occurring substances.

它也被称为一个最自然发生的有毒物质。

The greatest stress is found at the location on the cross section where V is the largest.

最大应力出现在横截面上V为最大的地方。