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A filter mask is a medical breathing device used on planet Ardana to protect Troglytes from the effects of the the zenite gas. (TOS-R: "The Cloud Minders")

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  • Filter mask

    A filter mask was a Federation breathing apparatus. It was capable of automatically eliminating...

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current04:59, February 4, 2009Thumbnail for version as of 04:59, February 4, 2009821 × 695 (39 KB)Gvsualan (Talk | contribs)