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1997-10-17
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1990-04-28
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1988-11-09
Process for the preparation of metal oxides or mixed metal oxides
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1994-01-19
Process for the direct reduction of metal oxides
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1992-03-11
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1990-03-28
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1989-08-10
Process for preparing fine particles of metal oxides
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1990-05-16
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1990-03-28
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1990-12-19
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1989-09-12
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1991-02-27
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1990-05-28
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1992-01-08
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1990-11-28
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1992-02-19
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1991-03-12
Method of 1-methoxy-2-propanone preparation
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1991-08-28
Process for preparation of na-thiobarbiturate
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1990-08-14
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1989-12-13
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1987-11-14
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1990-08-14
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Method for preparation of photoluminophors
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