| http://www.w3.org/ns/prov#value | - Although the adhesive is not particularly limited so far as it has a photocatalysis resistance, an oxide such as silicon oxide, aluminum oxide, zirconium oxide, calcium oxide and magnesium oxide, or an alkoxide as a precursor of these oxides is usually used. [0023] These adhesives may be used individually or as a combination of two or more thereof.
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