forced-oil circulation 强制油循环
forced oil circulation pump 强制循环油泵
directed forced oil circulation cooling 油导向冷却 ; 强油导向冷却
forced-oil-air circulation 强制油循环
forced-directed oil circulation 强迫导向油循环
forced circulation oil cooling 强迫油循环冷却
forced oil air circulation 强制油循环
forced-non-directed oil circulation 强迫非导向油循环
The temperature difference between copper and oil of natural oil circulation power transformer is bigger than that of forced oil circulation.
自然油循环变压器较以往强油循环变压器铜油温差加大，热问题就更加突出。
Since primary transformer of electric locomotive adopts the forced oil-circulation cooling method, its heating computation is rather complicated and difficult.
电力机车主变压器采用强迫油循环吹风冷却方式，其发热计算较为复杂和困难。
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