| http://www.w3.org/ns/prov#value | - ily generates compounds such as oxide or sulfide and so on, it is technically important to reliably join the external connection electrodes 201 and 211 without generating such compounds or to join them via their fresh surfaces after removing such compounds. [0037] In a first method of overcoming the foregoing problem, electrodes may be joined in a hydrogen-reduced atmosphere.
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