Abstract: A prefabricated panel comprising a pair of panel forming members wherein each of the panel forming members is made up of a continuous sheet of material of uniform thickness. The panel forming members are mechanically secured together by a plurality of spaced apart sub-girt members. The panel forming members may be used with or without an insulation means. The panel forming members are laterally offset from each other, and they may have various profiles or identical profiles.

Abstract: A process control apparatus, for example for internal combustion engine fuel injection control, includes a digital memory which produces an n-bit digital output in accordance with two independently variable input signals. The m most significant bits are transferred to a counter which is clocked to give a pulse length output. The n-m least significant bits control a logic circuit which is used to program another counter which is used to introduce an added delay to each output pulse. This arrangement enables higher resolution to be obtained using a limited size main counter.