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[1]-[J].Journal of Zhengzhou University (Engineering Science),1989,10(04):73-77.

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 10卷 Number of periods: 1989 04 Page number: 73-77 Column: Public date: 1989-12-01

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