| http://www.w3.org/ns/prov#value | - FIG. 2 is an enlarged, fragmentary, partially broken away, vertical sectional view, taken on a substantially central vertical plane, of the exemplary embodiment of the present invention of FIG. 1 and shows the interior details of one form of the valve seat means, the fluid-pressure expandable valve means, the valve-actuating member, the communication means for providing fluid under pressure for ex
|
