For substations that are designed to carry full load under the outage of any one transformer, a high emergency rating for a 24-hour period could mean the selection of smaller transformers and a substantial saving in substation cost.是什么意思_For substations that are designed to carry full load under the outage of any one transformer, a high emergency rating for a 24-hour period could mean the selection of smaller transformers and a substantial saving in substation cost.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句