| http://www.w3.org/ns/prov#value | - In an embodiment shown in FIG. 47, electrode bars 99c and 99d made of such electrode material as Au, Pt or the like are inserted in the storing chamber 91B of the reservoir casing 90B in an arrangement of the gas sensor in the embodiment shown in FIG. 39 from which the overlayer 96 is removed.
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