油浸风冷式变压器 oil-immersed forced-air cooled transformer

油浸风冷式 ONAF ; oil-immersed forced-air cool

油浸风冷变压器 Forced-air cooling oi-immersed transformer

油浸强迫风冷 oil-immersed air-blast cooling

强制风冷油浸变压器 forced air-cooled oil immersed transformer

油浸强油导向风冷-- Oil-immersed forced-directed oil circulation forced air cooling