This is a demonstration of measuring and visualizing the temperature drop time of cold air generated by a cold air cooler.
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Related page:

No.22 Cold air cooling of a beaker No.1 Cold air cooling of test tubes No.3 Cold air cooling of PET sheet No.2 Cold air cooling of PETE sheet No.4 Cold air cooling of Polycarbonate plate No.11 Cold air cooling of DDR RAM module No.5 Cold air cooling of PE cap No.14 Cold air cooling of Gorilla glass