A band saw with a complex coordination of a tilting motion and a translational motion between the workpiece and the band saw blade, so that a curved cut is made in the workpiece. The vehicle seat comprises a guide plate provided on the vehicle seat, a gear plate attached to the lower rail and movably provided on the guide plate in a straight direction, a pair of lock arms provided on the guide plate and engageable with a pair of gear portions of the gear plate when an emergency load is applied to a seat belt of a vehicle seat occupant. The main body further includes therein a secondary battery serving as a power supply for supplying a power to the pump unit, the ventilating unit and the control unit. The electric field is energized to control temperature in the proximity of at least one of the reaction wells. Finally, measured output delay values are substituted in to these parameter equations to generate actual values for the various FEOL and BEOL parameters, thereby allowing any areas of concern to be quickly and accurately identified.