| http://www.w3.org/ns/prov#value | - In order to suppress the creeping breakdown and the creeping discharge at the interface of the two kinds of insulating materials, a system for increasing the breakdown voltage by interposing an insulating resin such as an epoxy resin and a polyester resin which has a dielectric breakdown voltage higher than those of both the insulating materials therebetween (the first feature), and a system for r
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