Chinese and foreign achievements appraisal contrast analysis.

中外绩效评估的对比分析.

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METHODS: This study was conducted based on marketing theory using literature retrieval and contrast analysis method.

方法: 以市场营销学理论为基础,采用文献检索和对比分析法.

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Through contrast analysis, finds the reason of not allowed direct connection for transformer under the shaft.

并通过对比, 找出井下变压器中性点不允许直接接地的原因.

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