A heat exchange wall include a base plate; a plurality of first protrusions distributedly provided on a surface of the base plate, and a plurality of second protrusions distributedly provided on the base plate surface. The sprocket includes a set of regular teeth and a set of first and second teeth. The monitoring system redirects the channel signals to the second uplink signal processing circuit to form a second plurality of output signal signals. Pressurized fluid can also be supplied only to the second control chamber to operate the pump at a third equilibrium pressure andor additional control chambers can be provided if required. From a comparison, an error function of the current sensor can be detected. A deformation apparatus for deforming the resilient contact structures includes a deformation block configured to compress, bend or shape the resilient contact structures on the non-functional dice.