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   <dim:field mdschema="dc" element="description" lang="en_US">Thesis. 1976. B.S.--Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.</dim:field>
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   <dim:field mdschema="dc" element="subject" qualifier="lcsh" lang="en_US">Amplitude modulation</dim:field>
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   <dim:field mdschema="dc" element="title" lang="en_US">An active audio attenuator</dim:field>
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