...称“取得时效”（usucapio）；不动产则视当事人是否同住一省，分别为10年或20年，称为“长期时效”(longi temporis praescriptio)。
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... long-time credit 长期合同 long-time aging 长期时效 ; 长时时效 long-time kinetics 久期动力学 ...
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The results showed that the degradation of heat-resistant material after long-term aging at elevated temperature is the comprehensive results of the evolutions of various structural scales in the tested material.
分析讨论的结果表明,高温长期时效后该钢力学性能的劣化是温度、应力、时间等对材料各个结构层次造成退化的综合效应。
参考来源 - 12Cr1MoV锅炉钢管材高温力学性能及组织研究With the increase of temperature and ageing time,γ' phase coarsening occurs during long-term ageing.
在长期时效过程中随时效温度的升高和时效时间的延长γ'相发生粗化。
参考来源 - 热处理对镍基高温合金组织和性能的影响·2,447,543篇论文数据，部分数据来源于NoteExpress
研究了第二代单晶高温合金DD6长期时效后的拉伸性能。
The investigations of tensile properties of the second generation single crystal superalloy DD6 after long term aging at elevated temperature were presented.
在长期时效中，合金存在不同类型碳化物之间的转变，较低温度时向M _ (23) C_6型碳化物转变，较高温度时向MC型碳化物转变。
Different precipitation types of carbide in the alloy are transformed in long time aging treatment, turn to M_ (23) C_6 type at lower temperature and turn to MC type at higher temperature.
花岗石平台（花岗石平板）经长期天然时效，组织结构均匀，线胀系数极小，内应力完全消失，不变形。
A granite platform (Granite Flat Panel) was a long-term natural aging, organizational structure, uniform, linear expansion coefficient is extremely small, internal stress disappear, not deformed.
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