Spring, power spring, hair spring, driving mechanism utilizing them, and timepiece.
精密仪器的驱动用发条，钟表，驱动机构。
Actuator Type: Power open and spring closed.
触动器类型：电源开启和弹簧闭路。
When spring with happy steps, followed by a warm summer came here and power.
当春迈着愉快的脚步走了后，紧接着热情的夏又风风火火的赶来了。
When spring with happy steps, followed by a warm summer came here and power.
当春迈着愉快的脚步走了后，紧接着热情的夏又风风火火的赶来了。
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