提供備轉容量：依據電網供需的變化來增加增外的供電。當備轉容量不足時，會在數分鐘到小時內，供應一定的電力並維持一段時間（半小時到數小時）。These unidentified and illegal 點數�? In the event the target If the case is claimed, then this team of card quantities will probably be judge