一种组合瓦，为多层阶梯形结构，每一层包括至少两块瓦片；

The utility model provides a combined tile which has a multi-layer step structure, wherein each layer comprises at least two tile pieces;

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详细介绍了阶梯形零件冷挤压工艺的制订过程，根据实践经验总结了其冷挤压模具设计的结构特点。

The formulating process of cold extruding process for ladder-shaped parts are introduced in detail, the structural characters of cold extruding die design are generated basing on practice experience.

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本文介绍了车站大厅阶梯形不规则网架的结构布置、构造、内力分析、支座节点的分析与试验。

This paper presents the structural layout, the detailed analysis of stresses and support joints. and the tests of the stepped and irregular space frame of the station hall.

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