Start drawing the more complicated necklace. Use grounding colour for the foundation.
开始绘画比较复杂的项链。首先用底色画出项链的主干。
Building up soil models in different seasons establishes the foundation for the grounding system design of two substations.
不同季节土壤模型的建立为沱沱河和五道梁两变电站接地系统的设计奠定了基础。
Both of them provide theoretical foundation for analyzing performance of grounding grids in power current.
为分析工频电流下接地网的性能奠定了理论基础。
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