压下印把时，压力弹簧被压缩，驱动板通过主动记数环上的驱动滑槽推动主动记数环转动。
When the seal handle is pressed down, the pressure spring will be compressed, and the driving counting ring will be driven to rotate by the driving board.
压缩弹簧典型的应用时提供压力，比如电子接触弹簧；
Typical applications for compression springs are to provide pressure, as in an electrical contact spring;
压缩弹簧由线圈弹簧缠绕而成，线圈之间有空间，以便弹簧从自由长度压缩到最短的，工作长度储能或产生压力。
Compression springs are coil springs wound with spacing between the coils so that they can be compressed from their free length to a shorter operating length to store energy or provide a force.
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