10,25, etc. Oil-immersed transformer is the main insulation means of transformer, which relies on oil as cooling medium, such as oil-immersed self-cooling, oil-immersed air cooling, oil-immersed cooling and forced oil circulation. , and transformer oils ofNo. 10, No.25 and No.45 will be provided, because they are generally packed in 200L iron oil drums, each weighing 170 kg, and the specific specifications and models of transformer oils should be used.