| http://www.w3.org/ns/prov#value | - For example, U.S. Pat. No. 5,056,600 to Surjaatmadja et al., the details of which are incorporated herein by reference, discloses a control apparatus and method responsive to a changing stimulus such as pressure which increases at a decreasing rate of change during a closed-in period of a drill stem test in an oil or gas well.
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