reserve source of electric power
... reserve power supply 备用电源 reserve source of electric power 备用电源 reset circuit 复位电路 ...
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The traditional pyroelectric sensor (or a sound sensor) and the combination of light source, without reserve electric wire, place the product directly on the lamp and turn on the power.
将传统的热释感应器（或声音感应器）与光源结合为一体，?必预?管线，只须将产品直接安装在灯座上，打开电源即可使用。
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