| http://www.w3.org/ns/prov#value | - hat the elongated device will pass through bends in the tubing; a first cup packer mounted on one member and a second cup packer mounted on a second member adjacent said one member, said cup packers being faced in such a direction as to be actuated by the pumping of the fluid to move the device in one direction; a third cup packer mounted on a third member and a fourth cup packer mounted on a four
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