self-closing device

• 自动关闭装置

self-closing device的用法和样例：

例句

1. The first uses the light falling on the photodiode to discharge the capacitor, turning off the device once the required light output has been generated.
   第一种方式是透过光电二极体上的光源减少来对电容器进行放电，一旦所需的光源输出被产生之后就关闭装置。