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heat-exchanger, yeah.

Paul, thank you for enlightening this issue to me :)

Throbert

Dogs don't sweat. They simply don't have sweat glands in their skin.
Their sweat glands are all concentrated on the surface of the tongue, that's why a dog opens its muzzle and sticks...

I guess savoring the details of the Russian politics is the least the learners of Russian are supposed to be striving for.