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hgis underground substation maintenance price

300+ TOP SUBSTATION Multiple Choice Questions and Answers Underground substation is located at____ A. scarcity of land B. price of land is high C. high population density D. all of the above. 47. Which of the following is/are requirement of underground substation? A. good ventilation system B. size of substation is minimum as possible C. provision of emergency lighting and protection against fire

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