| http://www.w3.org/ns/prov#value | - Preferably, however, ultrasonic lens 14 is formed in its entirety as a single piece, for example by molding, casting, or thermoforming, regardless of whether ultrasonic lens 14 is simple or compound, as a unitary ultrasonic lens 14 manufacturing process minimizes the cost and complexity associated with the manufacture of HIFU transducer 10, and may also permit simultaneous bulk manufacture of seve
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