The victim was bound upon this wheel, on his knees, with his hands behind his back.
A continuous positive airway pressure (CPAP) machine was initially used mainly by patients for the treatment of sleep apnea at home, but now is in widespread use across intensive care units as a form of ventilation.
What is PPAP? Many industrial companies require that their parts providers utilize PPAP, or the Production Part Approval Process. It is used by almost every industry that produces and services part commodities and is the standard that ensures quality and efficiency with regard to part production.