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          二、空气开关则是老跳墙内暗线短路、
        2. 2. 小方块没弹出,闸排就是查原该电器内部漏电或短路,或某个插在插座上的空气开关电器内部烧毁短路) 。 逐一排查故障电器的老跳实操步骤