A system and method of playing recorded content on a DVD player employs software instructions on a DVD storage medium to control a DVD-Video player to make pseudo-random selections of content items from the DVD storage medium. The down hole drilling motor comprising a stator disposed in the tubular housing. The sleeve includes a plurality of inwardly directed protuberances providing a gap between a substantial portion of the cup sidewall and the sleeve. A basic matrix constructing the precoding matrix is extended to a frequency axis, such that it can be used as a Cyclic Delay Diversity structure. The intermediate production process is represented by the following reaction scheme. The lock close portion 60 includes a switch pressure section 66, which presses down the switch 40 when the lock close portion 10 reaches the closing position from the non-closing position.