A method includes receiving, into a target machine communicatively coupled to a first subnetwork, data for migration of a virtual partition from a source machine communicatively coupled to a second subnetwork. The fuel cell includes a high molecular weight electrolyte membrane held between a pair of the foregoing electrode structures to constitute an MEA and a pair of separators between which the MEA is sandwiched, such that at adjusting surface is formed between the MEA and each of the separators a gas passage. These resin chips 53 and 55 have been compressed from above and below and ultrasonic vibration has been applied thereto, thereby melting resin coats 3 in the coated electric wires W1 and W2 to pressure weld conductive wires 1.