7418: Other machinery involving a change of temperature

74181: Instantaneous gas water heaters 74182: Other instantan., storage water heaters, non-electr. 74183: Medical, surgical or laboratory sterilizers 74184: Dryers for agricultural products 74185: Dryers for wood, paper pulp, paper or paperboard 74186: Dryers, n.e.s. 74187: Machine. for making hot drinks or for heating food 74189: Other machinery involving a change of temperature 7418: Other machinery involving a change of temperature