结合实际，论述了图书馆藏书剔除工作的概念、原因、原则、方法、效果等具体问题。
Connecting with the practice, this paper discusses on some concrete problems such as the concepts, causes, principles, methods and results of library rejecting.
自我心理治疗的概念、适应症、过程、效果、原则等值得研究。
This paper explores the definition, process, result, and the principle of Ego Mental State Treatment.
介绍了稠油有限防砂技术的概念和原理及割缝筛管参数的设计原则，并对现场应用效果进行了分析。
Introduced concept and principle of heavy oil finite sand control technique, and also design principle of slotting screen pipe parameters were introduced.
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