| http://www.w3.org/ns/prov#value | - As to reference numerals, dashes are affixed to the same numerals as in FIG. 7, and explanation will be omitted except portions peculiar to thisembodiment.In this embodiment, the lower portion of movable iron core 12' has a valve stem supporting portion 12a' which comes into linear contact with a valve stem 3' along the circumference of the valve stemThe upper portion of the valve stem ' is formed
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