| http://www.w3.org/ns/prov#value | - The at least one external flange and step, or other surface, of the metal ring are long enough to provide adequate surface area in contact with the ceramic case, so as to prevent braze material from exuding from the joint along the outer circumferential surface of the joint while allowing an appropriate amount of braze material to be applied to the joint in order to create a strong bond.
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