| http://www.w3.org/ns/prov#value | - d droplet sizes; air supply means in the housing for supplying air to the first and second nozzles, the pressure and volume of the supplied air being suitable for creating the desired droplet sizes; control means in the housing for controlling operation of the pressurizing means and air supply means; a rechargeable battery pack removably mounted in the housing, the battery pack including a case, a
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