In two and three dimensions the yield limit is reached when a certain function of all the stress components reaches a fixed value.
在二维或三维的情况下，屈服极限是当所有应力分量的某个函数达到某一固定值时达到的。
The value of stress under air pressure test shall not exceed 80% of the yield point of the material in test temperature;
气体压力试验时的应力值，不得超过试验温度下材料屈服点的80%。
The value of stress under hydraulic pressure test shall not exceed 90% of the yield point of the material in test temperature;
液体压力试验时的应力值，不得超过试验温度下材料屈服点的90%；
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