7 (Based on 44(e)) [ ENGINES FOR MACHINES, namely, LINEAR HEAT ENGINES, LINEAR ELECTRIC ENGINES, ENGINES WITH POSITIVE OR NEGATIVE EXPANSION, HEAT ENGINES INVOLVING A VARIATION IN TENSION FOR MACHINES; EXPANSION COMPENSATORS, MOVEMENT TRANSMISSION ELEMENTS, COUPLINGS, ALTIMETRIC AND BAROMETRIC CAPSULES, EXPANSIONCHAMBERS, GASKETS,] THERMOSTATIC UNITS, [ ANTIVIBRATORY CONNECTING COMPONENTS, ALL BEING PARTS OF MACHINES,] TEMPERATURE, WATER AND PRESSURE REGULATORS, ALL BEING PARTS OF MACHINES; VALVES, BEING PARTS OF MACHINES OR MOTORS FOR MACHINES; HEAT CONTROLLERS OF MOTORIZED VALVES, BEING PARTS OF MACHINES; [ HEAT EXCHANGERS, BEING PARTS OF MACHINES,] THERMOSTATIC VALVES, BEING PARTS OF MACHINES OR MOTORS FOR MACHINES, [ PRESSURE-SENSITIVE CELLS] AND THERMOSTATIC VALVES FOR ALL FLUIDS, BEING PARTS OF MACHINES OR MOTORS FOR MACHINES, [ HEAT CONTROLLERS TO CONTROL TICK-OVER AND SPEED, BEING PARTS OF ENGINES FOR MACHINES; STARTERS FOR MACHINE MOTORS OR ENGINES;] DEVICES FOR DEPOLLUTION OF INTERNAL COMBUSTION HEAT ENGINES, namely, CATALYTIC CONVERTERS