When I was a kid I worked in a meat processing plant. Carving up carcasses as they moved down a conveyor belt. The belt's motors ran quite hot. You can guess.
Same place has a blast freezer. A warm can of soda placed in front of the fan.. 30 second to real cold, wow!
A lot of my family worked in the steel mills.
Mine too, Chicago south side Dad worked 37 years after WWII service. Grandfather too after WWI.