Ultrasonic/Sonic Rotary-Hammer Drills
NASA’s Jet Propulsion Laboratory, Pasadena, California
Thursday, July 01 2010
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Ultrasonic/sonic rotary-hammer drill (USRoHD) is a recent addition to the collection of apparatuses based on ultrasonic/sonic drill corer (USDC). As described below, the USRoHD has several features, not present in a basic USDC, that increase efficiency and provide some redundancy against partial failure.
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