A constant velocity universal joint which can provide an improved strength in a stem portion by simple and effective countermeasure. The data pattern selection circuit converts a testing data into different data patterns by the writing pattern selection units and accordingly writes to the corresponding memory data ends in order to allow the corresponding memory cells to store the data with the corresponding data pattern. Methods for producing a maize plant that comprises crossing hybrid maize variety X08A105 with another maize plant. The process controller is adapted to control the operating recipe of the tool using a plurality of control actions.