| http://www.w3.org/ns/prov#value | - conductivity stability than a flat bottom groove with a radial spring. [0008] Still more particularly, the angled sides may be disposed at about a 45??? with a flat center. [0009] In all of the embodiments of the present invention, one of the housing pin, or spring is preferable formed from platinum iridium with the most preferred being a platinum iridium spring.
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