Abstract: A shock absorber, in which external gas is sucked by movement of a piston rod to obtain compressed gas, which is used for inhibiting the “lag” phenomenon. A piston valve is connected to one end of a piston rod received in an inner shell and moved between rebound and compression strokes, an inner space of the inner shell being divided into a rebound chamber and a compression chamber by the piston valve. A reservoir chamber is provided in an outer shell outside of the inner shell to supply oil to the compression chamber in the rebound stroke and to recover oil in the compression stroke. The shock absorber has a high pressure tank with a high pressure chamber installed outside of the outer shell, and a self pumping unit for sucking gas and pumping it into the high pressure chamber using energy generated by movement of the piston rod.

Abstract: Disclosed herein is a method for producing a transparent or opaque flooring sheet or a flooring using a styrene-butadiene copolymer resin (as a thermoplastic elastomer) by calendering. The flooring causes no problems associated with environmental hormones, and generates no halogen gases or endocrine disruptors, such as dioxin, during incineration. Further, the flooring can be regenerated and reused at any time, and exhibits superior stability upon installation and mounting and excellent elastic restoration after application of stress due to inherent flexibility of rubber.

Abstract: The present invention discloses an infrared detection type shooting game machine and method, which changes the degree of difficulty and environment of a game depending upon a distance measured using a plurality of references arranged at irregular intervals, thus providing realistic and interesting games. The shooting game method includes (a) displaying images, including a mark, by a display means and displaying a plurality of references that are bases for detection of coordinates; (b) detecting a partial image of a certain region of a point indicated through .