除非电源接头是防火花的，否则不要再30米距离内，为电器设备通电。
Do not connect electrical equipment to a power source less than 30 meters away, unless the power source has spark-proof connectors.
除非电源接头是防火花的，否则不要再30米距离内，为电器设备通电。
Do not connect electrical equipment to a power source less than 30 meters away, unless the power source has spark-proof connectors.
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