boiler - soojusvaheti vee kuumutamiseks. Koosneb hrl mahutist ja sellesse paigutatud soojusvahetuspinnast, mille moodustavad torud. Kiirboileris voolab soojusvahetuspinna torudes kuumutatav vesi, torusid ümbritseb kuumutav aur, vesi või gaas; mahtboileris, vastupidi, ümbritseb torusid kuumutatav vesi.
8419 Machinery, plant or laboratory equipment, whether or not electrically heated, for the treatment of materials by a process involving a change of temperature such as heating, cooking ... condensing or cooling, other than machinery or plant of a kind used for domestic purposes; instantaneous or storage water heaters, non-electric
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