Literature synthesis the relative factors on flight fatigue are discussed, based on which, the principles for duty limitations and rest requirements are put forward.
资料综合就导致民航飞行人员飞行疲劳的相关问题进行讨论，并在此基础上提出民航飞行人员的飞行时限与休息制度的原则。
According to the numerical simulation of heavy-duty diesel engine to raise power, two methods to assess the strength of cylinder head bolt, static calculation and fatigue stress check, are introduced.
结合大功率柴油机提升功率的数值计算工作，介绍了评估气缸盖螺栓强度的两种方法：静强度分析法和疲劳强度校核法。
Fatigue properties of three case hardening steels for heavy duty gears after carburization were investigated by means of rotating bending fatigue tests.
利用旋转弯曲疲劳试验方法研究了三种重载齿轮钢渗碳后的疲劳性能。
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