In the dynamic design of underground structure, the research on vibratory character is of great importance.
在地下结构的动力设计中，结构振动特性的研究是一个重要的课题。
This paper introduces the present method of numerical analysis and design model for structure calculation in underground construction. Then, these calculative methods were evaluated.
本文介绍了目前地下工程结构设计采用的计算模型及相关的数值分析方法，并对各计算方法进行了评价。
The paper briefly introduces the structure and design of the commonly steering system for underground loader at abroad.
简略介绍了国内外地下装载机常用的转向系统的结构与设计。
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