The invention relates to an engine control valve including a body defining an inner duct and comprising a flap mounted such that it can pivot by means of a shaft, said flap comprising a first portion. These numbers andor cards can be used for a single or limited use transaction, thereby reducing the potential for fraudulent reuse of these numbers andor cards. Estimated symbols are iteratively improved by forming a reconstructed signal from the estimated symbols, subtracting the reconstructed signal from the CDMA signal to create a difference signal, and adjusting the estimated symbols based on a combination of the difference signal and the estimated symbols. The capacitive stack may serve as a core substrate on which a plurality of additional signaling layers of a multilayer circuit board may be coupled. The accommodation section is disposed in a region on a side opposite to a movement region in which the drive mechanism moves in a direction intersecting the movement direction of the image reading unit.