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Devices designed to deliver small controlled quantities of substances or other supplies. Dispensers usually consist of an enclosure made of metal, plastic or a combination of these with an opening to obtain the required substance or supply. Dispensers may be battery powered or hand operated; they are intended to deliver accurate quantities of the supply and/or to avoid the user\'s contact with the remaining supplies. These devices may be mounted on the wall, on a tabletop or installed as self-standing dispensers.
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