8404 Auxiliary plant for use with boilers of heading 8402 or 8403, e.g. economizers, superheaters, soot removers and gas recoverers, condensers for steam or other vapour power units, parts thereof
8404 Auxiliary plant for use with boilers of heading 8402 or 8403, e.g. economizers, superheaters, soot removers and gas recoverers, condensers for steam or other vapour power units, parts thereof