| 摘要 |
A method of manufacturing an electrical device in which a liquid electrically insulating filler substance is applied to a layer of electrically active grains which filler is allowed to contract thus exposing the peaks of the grains after which it is allowed to harden. The filler is preferably a resin hardenable by polymerization or by polycondensation in a liquid solution with a volatile solvent, for example polyurethane.
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