परिचय
लेटडाउन हीट एक्सचेंजर का एक इंटरएक्टिव 3D मॉडल।
अतिरिक्त संसाधन
https://en.wikipedia.org/wiki/Heat_exchanger
https://vesma.com/tutorial/hr_principles.htm
http://thermex.co.uk/news/blog/160-what-is-a-heat-exchanger
https://www.nrc.gov/docs/ML1125/ML11251A019.pdf