A process for the conversion of a hydrocarbon feedstock to produce xylene compounds. The top surfaces of the pins define a plane in which the substrate is supported. Rule information generation unit generates rule information by relating a rule on use of electrical device to a clock time, based on one or more predetermined time slots depending on a benefit of electricity consumed by electrical device. Once the fittings are installed, each door framework lacking the outer covering panel is installed in the respective opening of the body.