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Hardcover. Condition: New. HardCover. Pub Date: 2021-06-01 Pages: 207 Language: Chinese Publisher: China Railway Publishing House This book systematically introduces the technical status and development trend of air-conditioning systems for rail transit vehicles. focusing on the energy-saving technology of frequency conversion and the energy of air-conditioning systems. Evaluation method of consumption.?The book consists of eight chapters. mainly including introduction. comfort and health of rail transit vehicles. heat.