这个标准描述了获得流体静力设计应力(最大工作强度)的步骤，用于任何实际温度下的任何热塑塑料管道材料。

This standard describes the procedure for obtaining the Hydrostatic Design Stress (maximum working strength) for any thermoplastic pipe material at any practical temperature.

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通过对推土机平衡梁和车架纵梁的工作应力测定与分析，掌握了推土机的强度设计方法，为编制载荷谱打下基础。

Through test and analysis of working stress on balance beam and lengthwise beam of dozer frame, a strength design method and the basis for compiling load spectrum are given in the paper.

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本文第六章提出了Z源交流一交流变流器电路拓扑，介绍了其工作原理、控制方法、器件应力，设计方法等。

The sixth chapter of the thesis proposes the Z-source ac-ac converter topology, introduces its operating principle, control method, device stress, design method, etc.

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