看你所用的烟雾警报器的电源来源为何(9伏特、10年锂电池或硬件接线)，你必须依照制造厂商的指示维护保养。
Depending on how your smoke alarm is powered (9-volt, 10-year lithium, or hardwired), you'll have to maintain it according to manufacturer's instructions.
济南发光字失效一是来源于电源和驱动的失效，二是来源于LED器件自身的失效。
Ji 'nan luminous word failure comes from the failure of power supply and driver, and the two comes from the failure of LED devices.
锌作为化学电源的负极材料，不仅来源丰富，而且具有优良的电化学性能。
Zinc is used as the cathode material, not only the source is abundant, and has excellent electrochemical performance.
应用推荐