| http://www.w3.org/ns/prov#value | - or other inhibitor physically impeding flow in one direction or by a configuration of the valve to employ passage pressure to prevent opening. [0008] In a separate aspect of the present invention, such devices as contemplated above are combined with mechanisms to assist in transforming the state of the device from insertion to anchoring. [0009] Accordingly, it is a principal object of the present
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