A device for interconnecting electrical bundles, includes a plurality of pluggable connection and cross-connect cards for the electrical bundles. In at least one of such apparatuses, the select transistor can include a body region including a monocrystalline semiconductor material. A backflow preventer of the flow passage is slidably removable through the flow outlet for readily servicing the components of the backflow preventer as desired. A voice coil rides in the cylindrical magnetic flux gap and its leads are brought out through the opening to the other side of the magnet. The cutter tooth groups may be disposed at least partially outward of associated relief surfaces in a radial direction with respect to the drive shaft axis. The one or more servers receive sensor data associated with sensors from automobile maintenance systems associated with respective ones of multiple automobiles, and analyze the sensor data, using the expert system and the expert knowledgebase, to diagnose whether the multiple automobiles require maintenance andor repair.