A mold assembly for use with an automated dry cast concrete machine including a plurality of mold cavities, each mold cavity formed by a plurality of liner plates, wherein at least one liner plate of each mold cavity is moveable between an extended position and a retracted position relative to an interior of the mold cavity. A power system in accordance with one embodiment of the invention includes an aircraft auxiliary power unit and a controller coupled to the aircraft auxiliary power unit, with the controller being configured to automatically stop the auxiliary power unit while the auxiliary power unit is functioning normally. The circuit instantaneously measures, e. The second coupling device includes a second connector corresponding to the first connector. When the mobile device is located in a vehicle, the determination module is configured to determine whether the vehicle is driving along the preset route based on the satellite-positioning signal.