Ключевые слова:
Liquid-level indicators|Oil-filled electrical equipment|Type testing|Pour point|Liquid electrical insulating materials|Oil-immersed transformers|Protected electrical equipment|Kinematic viscosity|Explosive atmospheres|Mineral oils|Quality control|Marking|Type o protected electrical equipment|Electrical equipment|Pressure testing|Fire point (temperature)|Insulating oils|Temperature|Testing conditions|Acidity|Safety measures|Flash point