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Patent Abstracts of Japan, vol. 012, No. 308 (E-647), published Aug. 22, 1988. |
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English Language Abstract of JP 9-32765. |
English Language Abstract of JP 9-32729. |
English Language Abstract of JP 32-18940. |
Finley et al., “An Analytical Approach to Solving Motor Vibration Problems”, Petroleum and Chemical Industry Conference, Sep. 13, 1999, pp. 217-232. |
English Language Abstract of JP 11-294361. |
English Language Abstract of JP 9-131001. |