| http://www.w3.org/ns/prov#value | - It should be noted that while simple flapper valves are shown representationally in FIGS. 3-5 and 7 as means for controlling the flow of fluids or other material into and out of the inlet 56 and outlet 58, respectively, any number of suitable valving devices may be employed to achieve the desired function, including, for example, ball valves or the like.
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