| 摘要 |
PROBLEM TO BE SOLVED: To reduce noise of a medical accelerator. SOLUTION: The medical accelerator 20 is equipped with a noise collecting device to collect noise generated by an induction core 5 and feedback controlling systems 11, 12, 13, 18 which produce sound to counteract the noise generated by the induction core 5 to make the collected noise approximately zero. COPYRIGHT: (C)2003,JPO
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