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Electrically assisted bicycle |
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Electromechanical transducer and electrocoustic transducer |
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Acoustic capacity, volume, and surface area measurement method |
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2012-01-31 |
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Sound insulation/absorption structure, and structure having these applied thereto |
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2008-12-16 |
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2007-06-05 |
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2006-12-19 |
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Elastic wave control element using piezoelectric materials |
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— |
2000-06-13 |
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