查询词典 protective agent

And then, the prominent problems about uncorrect action of protective relays for disturbance are discussed. Furthermore, the immunity of different ports in protective device has been thoroughly studied in this desertion.

首先探讨了骚扰源的形成、特征及其传播到二次回路的途径，然后从骚扰源着手对变电站骚扰引起保护不正确动作的几个突出问题进行了研究；从敏感设备入手对保护的各个端口的抗扰度进行了研究。

Shanghai Protek Protective Film Co.,Ltd is a high-tech company dedicated to provide professional surface protection in the fields of construction, household appliance, plastics, electronics, automobiles etc.. We tailor-make surface protective films in varations to metals, pre-coating metals, plastic sheets, automobile decorative products, LCD, mobiles, name plates etc..

上海普诺泰保护膜有限公司是一家致力于专业提供表面保护膜的科技公司，为建材、家电、塑料、电子和汽车等行业提供全面的表面保护解决方案，为金属、涂层金属、塑料板、汽车内饰、液晶、手机和标牌等产品量身定做表面保护产品。

The results show that after quenched and tempered with protective coating,no elements in the protective coating are found to permeate into the matrix,but the martensite laths in welded zone and heat affected zone are refined and the dispersion of carbides in these area is increased,the sizes of the dimples in these fracture are decreased.

通常情况下，D406A钢壳体在热处理中未采用保护气氛，造成调质后壳体表面脱碳严重，使壳体强度降低。为防止或减少调质处理过程脱碳带来的不利影响，可采用保护涂料或保护气氛热处理以及真空热处理等[2]，但对于大型工件，采用保护气氛或真空热处理需要大量的设备资金投入；而采用保护涂料投入较少。

In order to prevent heat flow from transferring to internal structural componants, thermal protective composites are used to absorb and consume plenty of heat by means of mass losing caused by complicated physical and chemical reactions of decomposing, melting, vaporizing, subliming and so on, and widely applied as thermal protective components of strategical and tactical missiles and other re-entry spacecrafts.

烧蚀防热复合材料在热流的作用下能发生分解、熔化、蒸发、升华等多种消耗热能的物理—化学变化，藉材料自身的质量消耗带走大量热能，阻止热流传入结构内部，在战略战术导弹和航天器的防热部件中得到广泛应用。

Qian Xuesen China which toddled for the same year has put on a protective suit, this protective suit develops today, very drew out trillion Chinese people's back firmly!

钱学森为当年蹒跚学步的中国披上了一层防护衣，这层防护衣发展到今天，坚定地挺起了亿万中国人民的脊梁！

60 Rollover Protective Structures 滚动保护结构 Rollover protective structures apply to the following types of materials handling equipment: All rubber-tired, self-propelled scrapers, rubber-tired frontend loaders, rubber-tired dozers, wheel-type agricultural and industrial tractors, crawler tractors, crawler-type loaders, and motor graders, with or without attachments, that are used in construction work.

滚动保护结构适用于下列类型的材料处理设备：所有橡胶轮胎的，自力推进的铲运机，橡胶轮胎的前端装载机，橡胶轮胎的推土机，轮式农用和工业拖拉机，履带式拖拉机，履带式装载机，和机动平地机，带有或不带有附件的用于施工工作的那些机械设备。

Moreover, second-winding current waveform of a current transformer is calculated under the transient current of the typical short-circuit fault by numerical method. The analysis shows that the relevant protection equipment may refuse to trip when the fault current is extra high. It will result in the maloperation of protective relays for loss of their selectivity, and cause other protective relays to operate beyond range, and extend the scope of shutdown of power supply.

在这些回路出口处发生相间直接短路等严重故障时，流过相应TA一次侧的故障电流可能达到TA额定工作电流的100倍以上，大大超过了保护用TA的10%误差容许倍数，将使TA严重饱和，从而影响相关的保护设备的动作性能，因此有必要对在这种特大电流作用下的TA的传变特性做一些探讨，以分析其对继电保护装置动作特性的影响及应采取的措施。

Fire-retardant protective clothing: forces, petroleum, chemical, metallurgical and forestry industries such as special protective clothing.

阻燃防护服：部队，石油，化工，冶金和林业等行业的特种防护服。

The gray system theory is introducted for the study of failure of protective coating of bridge, and a gray model GM （1, 1） of coatings corrosion area variantion with time is built, a generic predict formula of protective coating life of bridge is put forward based on this theory.

将灰色理论引入到桥梁防腐蚀涂层的失效研究中，建立了涂层腐蚀坑剥落的面积随时间变化的GM（1，1）模型，并在此基础上推导出桥梁防腐蚀涂层寿命的一般预测公式。

Author has introduced the corrosion causes of various kinds of gas tank ,the concrete requirements of protective materials and protective construction design,discussion was made for protection construction procedures of various kinds of gas tank ,the application practive indicates that the protection structure of coal gas tank ,forming surficial/middle/bottom layers is the ideal protection design.

介绍了各类气柜的腐蚀原因；提出了防护材料和防护结构设计的具体要求；论述了不同类型气柜的防护施工程序。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。