A plug and socket electrical connection for environments with high humidity and low temperatures has a socket with female connections, a circular recess for receiving a mating part and tabs and a plug with a male connection, the mating part and hooks. The separation device has a fill level determination device for determining the fill level of in the temporary accumulator. A slider bar is movable between a blocking position in which the side bar is prevented from permitting rotation of the barrel, and an unblocking position in which the side bar permits rotation of the barrel. The body has at least a first bent portion which is bent in a plane roughly parallel to the pair of long sides. The apparatus includes a water supply system in fluid communication with the open volume via nozzles for flowing water through and back-filling the volume in a manner that does not produce bubbles within the volume. Neurogenic compounds in general and neuropeptides in particular have been found to be highly effective in stimulated repair of ligaments damaged due to traumatic injury, ligament disease, and disuse.