| http://www.w3.org/ns/prov#value | - is a transverse sectional view taken on the line 3--3 of FIG. 1; FIG. 4 is a modified form of the invention; FIG. 5 is a transverse sectional assembly view taken on the line S5 of FIG. 4; FIG. 6 is a modified form of the actuating mechanism useful with such types of valves or apparatus in which only part of a cycle or rotation for operation is necessary; FIG. 7 is a further modified sectional view
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