| 摘要 |
An air-purifying filter device for a sealed optical enclosure of a luminaire comprises a coherent mass of activated charcoal particles contained in a rigid holder and having a plurality of recesses in its surface to increase the filter surface area, lower its air flow resistance, and reduce the amount of contaminant deposit thereon. The filter device is arranged in an enclosure formed by separable connecting parts of the luminaire in communication with the sealed optical enclosure.
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