A relationship engine provides for the management of relationship information between entities. Then the first groove of the race gear is disengaged from the rotating groove-machining tool while holding the race gear against rotation about its gear axis. The linear actuator assembly enables the valve to move from the open position to the closed position when it is heated to a predetermined temperature. This can be completed without using a conventionally necessary high price circular polarizing film, and therefore it is possible to reduce the cost of manufacturing the EL display device. This information will be matched with information in a database, which information provides routing information to a producer location.