The existing piston ring with multiple sides has irregular wear of the cylinder, so the new ring ring cannot be used to closely contact the cylinder with the piston.However, the spring-type piston ring has one end of the multi-turn dried spring to allow air to flow between the rings. To reduce, the end is attached like a washer, and one end is exploded like the existing spring to help the air escape during compression between the springs. When the piston moves up and down, the spring type ring is rotated so that the closed surface of the spring ring As a result, the cylinder is worn in a perfectly circular shape.;Cylindrical wear of the cylinder can be eliminated by sagging.;When the spring is stretched and contracted, the difference in diameter is applied. When the pressure in the cylinder is generated, the spring-type piston ring contracts, so that the diameter of the ring increases and keeps the cylinder close to the piston. When the piston moves downward, the contraction force of the spring-type piston ring is weak, so that the smaller the diameter of the ring is, the less the friction between the cylinder and the piston makes the cylinder's reciprocating lighter.;The higher the pressure in the cylinder, the larger the diameter of the spring-type piston ring, and thus the tighter the tube seal between the cylinder and the piston. However, the cylinder absorbs the diameter of the elongated ring, while the remaining spring is dried to digest the elongated diameter.
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