working stress design

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

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。

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This paper is a brief introduction to the design structure and working principles of cement truck laying stress, on some problems to which special attention should be paid during designing and manufacturing, for example parameters calculation and structure selection of gasification equipment.

本文概述了油田固井配套的气卸式散装水泥下灰车的设计结构与原理，着重讨论了下灰车在设计和制造中应注意的几个问题，如气化装置设计的参数计算和结构形式等。

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