原理

Based on gas dynamics,a mathematical model for the air brake system of train is established.

根据气体动力学原理建立了列车空气制动系统的数学模型，预测了制动系统紧急制动作用；陆界长度与机车大闸排气口面积、列车管定压及列车长度的关系。

This paper describes the development of urban rail traffic and its significance and the necessity of electric braking. Air brake system and focuses on the analysis, the choice of the braking system, the structure and principles of pneumatic braking system. Finally, the prospect of urban rail transport vehicle braking system developments.

本文阐述了城市轨道交通及其发展的意义，分析了电气制动及其研究的必要性，并着重对空气制动系统进行了分析，分析了制动系统的选择、气动制动系统的结构及原理，最后展望了我国城市轨道交通车辆制动系统的发展趋势。

The principle of using an air ionization chamber to monitor doses in heavy ion radiation research is described.

论述了采用平行板电离室在重离子辐射生物研究中监测剂量的原理。

In this paper, a new anti-shock mobile hard disk based on subminiature air chamber technology is presented, theoretical and experimental research is applied on it.

本文提出了一种基于被动抗震原理的新型微气囊抗震移动硬盘，并对其进行了理论及试验研究。

This paper introduces the structure,maintenance and management of air compressor in HBO C.

本文介绍了高压氧舱空压机的结构原理、维护和管理。

This design uses the simple air current to fullfill children＇s dream.

本设计利用气流的简单原理去完成这个孩子心中的梦想

The traditional exhaust hood and canopy hood with attached air curtain have different principles.

传统排风罩和气幕上吸罩是两种工作原理不同的局部排风设备。

The paper introduces as how to design the exterior double ventilating curtain wall with air flow theory to realize energy efficiency and it also presents the measures to make sure quality of the curtain wall.

文章介绍了如何应用空气流动原理来设计外循环通风双层幕墙，以达到节能的目的，并提出相关的措施来保证幕墙性能。

According to resonant principle, a suitable resonant chamber is designed for intake system. The low frequency sound pressure level is decreased in the body. The high frequency noise is improved through damping air filter brace.

因此，采用共振消声的原理，设计了合适的共振腔，降低了低频噪声成分，并采用阻尼降噪技术，对空气滤清气的支架进行了处理，降低了高频噪声成分。

The air supply principles,structural features of the static pressure air supply duct are described.

介绍了静压式送风风道的送风原理、结构特点，并对该风道进行了结构分析。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。