| http://www.w3.org/ns/prov#value | - FIG. 2 is a side sectional view of the above-mentioned embodiment, wherein the diagram (A) is a sectional view along the arrow A???A in FIG. 1, the diagram (B) is a sectional view along the arrow B???B in FIG. 1, the diagram (C) is a sectional view along the arrow C???C in FIG. 1, and the diagram (D) is a sectional view along the arrow D???D in FIG. 1;
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