... secondary motion次级运动 secondary principal stress次枝力 secondary resonance次级共振 ...
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secondary principal stress trajectories 主应力迹线
secondary y principal stress 次枝力
·2,447,543篇论文数据，部分数据来源于NoteExpress
There are some differences of principal stress between secondary tectonic areas.
不同构造区主应力方向存在一定的差异。
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Objective to analyze the major type of occupational stress and its principal influential factors in primary and secondary school teachers.
目的分析中小学教师主要职业紧张反应类型及其主要影响因素。
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