… use with boilers of heading 84.02 or 84.03 (for example, economisers, super-heaters, soot removers, gas recoverers); …
Explanatory notes
… use with boilers of heading 84.02 or 84.03 (for example, economisers, super-heaters, soot removers, gas recoverers); … water by utilising the waste heat of the flue gases or, in some types, exhaust steam. They usually consist of headers …