The description of the item 8419908510 of Germany HScode: Parts of machinery, plant and laboratory equipment, whether or not electrically heated, for the treatment of materials by a process involving a change of temperature, and of non-electric instantaneous and storage water heaters, n.e.s. (excl. of medical, surgical or laboratory sterilizers, those for the manufacture of semiconductor boules or wafers, semiconductor devices, electronic integrated circuits or flat panel displays, and of furnaces, ovens and other equipment of heading 8514) : Of heat exchange units, for use in civil aircraft