| http://www.w3.org/ns/prov#value | - A method of making at least twenty PTC thermistor bodies according to claim 17, wherein said electrically conductive particle is a particle obtained by a decomposition reaction of a compound expressed by the following formula (I): M(CO)4 (I) where M is at least one element selected from the group consisting of Ni, Fe, and Cu. 19.
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