An upper torso garment and a lower torso garment each comprising a respective torso encircling band. The ECU determines a locked state or an unlocked state of the lock mechanism to allow the second rotor to be released from being locked to the first rotor when the lock mechanism is in the locked state. By this means, it is possible to achieve the heat-reactive resist material having high resistance to dry etching using fluorocarbons to form a pattern with the deep groove depth. 1 mlg, an average channel diameter ranging from 30 to 150 \u212b and a density of the base sites ranging from 10 to 900 \u03bcmolg.