| http://www.w3.org/ns/prov#value | - Here, there is a limit to the power source for providing the driving power for the ultrasound transducer 2, and the high power region for the focal point shifted by the phase control is limited to a certain range around the geometrical focal point of the ultrasound transducer 2, so that the treatable region can be limited by these setting of the driving conditions for the ultrasound transducer 2.
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