A method and apparatus for printing a one-dimensional, continuous signal, such as a sound wave, as a printed pattern and for recovering the sound wave from the printed pattern. We have found that the liquid hydrocarbon oil composition prevents the stress cracking promoting materials from interacting with the polymeric structure of the stressed container to prevent or inhibit stress cracking in such materials. The lateral surface of the compound semiconductor layer is removed by a digital alloy method. An axle, having at least one wheel, is coupled to the pivot. The user may have a multifunction smart card that is capable of downloading and executing programs, based upon personal and authentication account data, which is selectably stored on the smart card.