| http://www.w3.org/ns/prov#value | - Control signals to tools 16 and 18 and valve 20 can be provided within a different pressure range as that required for actuation of tools 16 and 18, and the ranges can be higher, lower, or overlapping.FIG. 2 illustrates one combination of communication and power functions through the same hydraulic tubing, conduit, passage or line such as line 10 wherein the control signals are provided at lower p
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