The present invention provides an apparatus for roasting skewered food in which a raw material of skewered food can easily be set on a skewer holder, so that a skewered roasted food can be cooked easily and quickly, and the skewer holder can easily be dismounted within a short period of time. The content having the first PID is placed into a data stream. With this, it becomes possible to avoid engine speed destabilization and other various problems even if the learned value in effect during pedal riding is used for engine idling speed control. The pressure in the wellbore is increased by introducing the oxidizing fluid under pressure such that the oxidizing fluid substantially permeates a majority of the treatment area and initiates a combustion process. The system’s processor establishes two programmed toggle switch settings; one typically slaved to the other.