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This type of spring, also known as an extension spring, works by resisting a pulling force. It absorbs and stores energy as it extends and then at a certain length, will create a return force and bring two components back to their original position. In their original, unloaded state, the adjacent coils will touch each other - however, the initial tension must be overcome before a tension spring extends.

또한, 아크릴 사인 홀더는 경제적으로도 효율적인 선택입니다. 비교적 저렴한 가격으로 대량 구매할 수 있어, 많은 기업이 비용 효율적인 방식으로 광고 및 정보를 전달할 수 있습니다. 특히, 작은 상점이나 스타트업 기업은 초기 비용을 절감하면서도 효과적인 마케팅 도구로서 아크릴 사인 홀더를 활용할 수 있습니다.

Shot Peening–Shot peening consists of impacting the surface of the coiled spring with shot, small round metal balls, glass, or ceramic particles. The impact of the many shots produces a compressive stress layer and changes the coil springs mechanical properties. The barrage of shots smooths the surface of the spring and compresses it.