发光器件无需电池电源或任何其他形式的收费，绝不需要维修或维护。
The light emitting devices require no battery power or any other form of charging, and never need servicing or maintenance.
发光器件无需电池电源或任何其他形式的收费，绝不需要维修或维护。
The light emitting devices require no battery power or any other form of charging, and never need servicing or maintenance.
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