西南石油大学学报(自然科学版) ›› 1990, Vol. 12 ›› Issue (1): 105-108.DOI: 10.3863/j.issn.1000-2634.1990.01.014

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  • Received:1989-10-06 Revised:1900-01-01 Online:1990-02-20 Published:1990-02-20