The invention aims to provide a peeling method without damaging a peeled off layer and to allow separation of not only a peeled off layer having a small surface area but also the entire surface of a peeled off layer having a large surface area. In several embodiments, data that is initially added to a database block is left uncompressed until a predetermined condition is satisfied, which happens infrequently. The apparatus and method may prepare multiple-metal or metal-carbon heterogeneous composites, and may be applied to various metal- and carbon-based adsorbents, absorbents, gasliquid separation membranes and various catalyst processes. Preferably, the annular ring is rotated by attaching a pair of tethers to the annular ring and to a rear surface of the air bag cushion.