查询词典 protective device

ABSTRACT Power electronics devices are developed rapidly. There are some factors which influence the protective properties of the devices, including such as electrical characteristics of protection materials, the interface conditions of protective materials-pn junction, the surface effective charge density, the polarizable or unpolarizable properties of organic protective materials, etc.

电力半导体器件是近期发展起来的一类功率电子器件，其表面保护与其它电气元件不同，一方面要考虑器件表面绝缘保护材料的电性能和含杂等因素；另一方面，器件的表面钝化保护材料与器件接触后，器件的界面情况、材料与器件接触带电情况、以及材料所含官能团的极性等情况，也是影响器件性能的主要因素。

This product is a solvent-permeable protective agent, as the protective agent can have chemical bonding reaction with the stone, it can form a protective film with very low surface energy, and this film can excellently resist water and oil, and can retain the natural air permeability of the stone.

Product features ●本品为溶剂型渗透性防护剂，由于防护剂能与石材等产生化学键合作用，形成一道表面能极低的防护层，从而起到良好的防水、防油性，同时保持了石材的天然透气性。

In order to raise the accuracy of the measurement of tangent of dielectric loss angle in XLPE cables,efforts were made to explore the effect of sample preparation and use of protective ring,i.e.the effect of different protective rings and different distance between the protective ring and the insulation shield on the accuracy of the tgδ measurement under a given measuring voltage.

为了提高交联聚乙烯绝缘电力电缆介质损耗角正切测量的准确性，对电缆试样制作保护环等问题进行了深入地探讨，即在一定的测量电压下，采用不同的保护环以及保护环与绝缘屏蔽之间不同的距离，对tgδ测量值的影响进行了探讨，并对测量工作提出了应注意的若干问题。

Methods Self-designed questionnaire about contagion occupational protection knowledge was used to understand the basic situation, laws and regulation on contagions, the routines to obtain the protective knowledge, common protective methods, demands for protection knowledge, post-training reflections and protective measures among 78 nurses in the centers of blood decontamination of 6 hospitals in Guangdong Provincial.

方法采用自行设计的传染病职业护理防护知识调查表对广东省6家医院78名血液净化室护理人员基本情况、传染病法律法规了解程度、防护知识获得途径、常用防护方式、防护知识需求、培训后感受以及防护应对方式等内容进行调查。

To study the wet thermal protective performance of fabric for fire fighters wears, 4 kinds of fire-retardant multilayer fabric suitable for fire fighters wears were used as samples, and the thermal protective performance value of the sample fabrics were tested through thermal radiation and thermal convection integrated experiment under 5 kinds of wet state and required time leading to the second-degree burn. Different layer fabrics' thermal protective performance after absorbing water was compared.

为研究消防服用织物的湿态热防护性能，以4种适宜用作消防服装多层结构的面料为试样，通过热辐射和热对流综合热防护性能实验，测试织物在5种湿状态下热辐射和热对流综合热防护值TPP和二级烧伤时间，比较不同层面料吸湿后热防护性能的变化。

However, protective tariff is a double edged sword, protective tariff of appropriate measure will benefit to promote the development of infant industries, on the other hand, protective tariff beyond appropriate measure will run counter to our desire.

可是，关税保护是一把双刃剑，适时、适度的关税税率，对于幼稚产业的成长具有非常重要的作用，为时过长、力量过度的保护会适得其反，成为保护落后，最终阻碍幼稚产业的发展。

An agent for a protective film which comprises a liquid mixture of a urethane type compound, methyl ethyl ketone and ethyl acetate and a curing rate enhancing agent comprising an isocyanate type compound and ethyl acetate; and a method for forming a protective film which comprises applying the agent for a protective film on the outer surface of a mold (9) or on the region of the outer surface of the mold (9) except a specific portion as an article to be coated.

本发明提供了一种保护膜制剂和形成保护膜的方法，其中所述保护膜制剂含有聚氨酯型化合物、甲基乙基酮和乙酸乙酯的液体混合物与含有异氰酸酯型化合物和乙酸乙酯的固化增速剂；所述形成保护膜的方法包括将保护膜制剂涂布于模具(9)的外表面或涂布于模具(9)的外表面除了作为待涂布制品的特定部分以外的区域。

The matching device automatic test-board is the checking tool checked the matching device capability, precision and reliability are the technique of the the matching device, the precision is the precondition of checking the matching device, the reliability is credibility degree of the decision checking consequent.the topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent ac to transfer dc module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2the feedback self-checking module is constructed by singlechip compositive 16 high accuracy a/d , established a closed-loop control system through this module and improved system's overall precision effectively.

匹配装置自动测试台是检测匹配装置性能的检测工具，其重要的技术指标是精度与可靠性，其高精度是作为检测匹配装置的前提，可靠性是决定了检测结果的可靠度。本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度a/d构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

This method can be applied with two phases after obtaining the software and hardware context information of the user's access device:(1) Agent sorts and filters out the content display of original web pages according to the retrieved device information;(2) Displayable web content pages shall be handled properly and then adapted to certain web language such as HTML, CHTML and WML...etc which is suitable for user's device so that the web content can be properly displayed on user's device finally.

我们将提出一个以环境导向( Context-Aware )服务为基础的网页内容转换修改方法，此方法在取得使用者存取设备的软、硬体环境资讯后，分两个阶段处理：(1)依据设备资讯由代理程式筛选及过滤原始网页内容物件的呈现；(2)适合呈现的网页内容，经过适当的页面处理后，再转换成使用设备适用之网页语言，如 HTML、CHTML 及 WML 等，最后呈现在使用者存取设备上。

First, the wheelset is fixed and rotated by the device used hi vehicle depot as usual. Second, the center line of wheelset axis is determined by a device called axis-center probe. Last, the acting device for sensor can draw a whole felloe profile, which is made up of parallel-pole device and rotating-probe.

鉴于此，本文给出了一种全新的测量方案：采用车辆段普遍使用的转轮器实现被测轮对的定位；采用车轴基准探尺测定被测轮对的轴线；采用并联式伸缩机构和旋转测头作为传感器的执行机构，测定轮辋断面的轮廓线。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48