This paper explores the construction and overall design idea of cab ceiling for urban rail vehicle, presents the main kinds of structure, and describes the development trend.
文章对城轨车辆司机室天花板构造和总体设计思路进行了探讨．分析介绍了目前城轨车辆司机室天花板几种最常用的结构形式，并对其发展趋势进行了展望。
This article summarized the construction safe-environment livestock and poultry farm design idea, the characteristic, the type, the existence question and the prospects for development.
本文综述了环境安全型畜禽舍设计理念、特点、类型、存在问题和发展前景。
Viewing on premonitory maintenance, the development idea of construction machinery management and maintenance system is proposed.
从预防性维护的角度出发，提出了工程机械管理及维护系统的设计与开发思路。
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