The design of the utility model uses the one way stopping and retreating device to realize the manual reset, consequently enlarges the range of application, reduces the volume and reduces the cost.
本设计利用单向阻退器实现手动复位，从而扩大了应用范围，缩小了体积，降低了成本。
The design of the utility model uses the one way stopping and retreating device to realize the manual reset, consequently enlarges the range of application, reduces the volume and reduces the cost.
本设计利用单向阻退器实现手动复位，从而扩大了应用范围，缩小了体积，降低了成本。
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