| http://www.w3.org/ns/prov#value | - In another embodiment, the device 10 further includes additional sensors such as temperature, ultrasonic, and pressure sensors, for measuring properties of biological tissue and other materials used in the practice of medicine or surgery, including determining the hardness, rigidity, and/or density of materials, and/or determining the flow and/or viscosity of substances in the materials, and/or de
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