A power unit 16 includes an armature 38 rotated always in unison with a cable drum 17 and movable in an axial direction of a drum shaft 25, a flange 39 always connected to a motor 28 side, and a magnetic coil portion 37 bringing the armature 38 into abutment against the flange 39. Additionally, the composite false match rate can be mapped to a score, wherein an attestation message is generated based on the score. The motive device comprises a motor and a rotatable propeller, in which the motor is connected to the rotatable propeller for rotating the same. Storage batteries and hydraulic control equipment are fully encased in the storage cabinet. The spacer is made of one elected from the group consisting of metal, elastomer, epoxy, and photo sensitive resist.