| http://www.w3.org/ns/prov#value | - FIG. 2a is a left side view of a part of the flow amount measuring body and a venturi tube part molded in a body, FIG. 2b is a sectional view taken along the line 2b--2b and showing a state when it is molded by three parts of molding dies, and FIG. 2c is a right side view of the integrally molded part;
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