A lens barrel forming a substantially annular positioning portion on the inner surface thereof is provided. By wrapping the garment holder around the perimeter of the suitcase it does not require folding. Objects to be coated are prepared to retain powder charged with static electricity. The collimation laser beam output by the collimation laser generating section is applied to the atoms in the direction of the tossed atoms, and the switch is turned off before the atoms reaches the microwave resonator. The steam discharging pipe is connected with a steam supplying pipe which communicates a cavity with a cooking compartment to supply steam from the apparatus to the cooking compartment.