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Chemical test paper sold in sheets, polymeric films and liners, strips, tags, and pads that detect oxygen; chemical test paper sold in sheets, polymeric films and liners, strips, and pads, that indicate the presence of oxygen; Sensors, namely, chemically treated detector labels, sheets, strips, pads, and tags that detect oxygen; sensors, namely, chemically treated detector labels, sheets, strips, pads, and tags that indicate the presence of oxygen; sensors, namely, chemically treated detector labels sheets, strips, pads, and tags that detect oxygen by means of color change induced by a chemical reaction or shift in oxidation state, not for medical purposes