This is the 8567th most frequent Korean word.
가동시켰던
"가동시켰던" means "had operated" or "had activated."
The word '가동시켰던' is used here to indicate the action of operating or starting a machine in the past, showing a completed action.
그는 평소보다 일찍 기계를 가동시켰던 날이었다.
That was the day when he operated the machine earlier than usual.
In this context, '가동시켰던' refers to the past activation or initiation of the system, emphasizing its functioning at that specific past time.
당시 그들이 가동시켰던 시스템은 혁신적이었다.
The system they started at the time was innovative.
Here, '가동시켰던' denotes the initial operation or utilization of equipment in the past, reflecting its significance and continued use.