Production principle, character and primary influence factors of Descartes ray are studied by experiments on the basis of theoretical analysis.
在理论分析的基础上，通过试验着重研究了纤维笛卡尔线的产生机理、特征和主要影响因素。
The value chain analysis is a primary step of strategic cost management, but contemporary research on it only converges on its theoretical flank.
价值链分析是战略成本管理的首要步骤，但目前对价值链的研究仅限于理论探讨。
Theoretical analysis, simulation experiment and engineering exploration are adopted to study the impact of the location of primary key stratum on the evolution range of water flowing fracture.
采用理论分析、模拟实验和工程探测等方法，就覆岩主关键层位置对导水裂隙带高度的影响进行深入研究。
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