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De cola - PowerPoint PPT Presentation

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????????????. ??????? ???. H. C. N. C. H. 3. N. N. H. M. a. u. v. e. i. n. e. A. l. i. z. a. r. i. n. 3. H. C. 3. H. N. +. 2. H. C. N. C. H. C. H. 3. 3. 3. H. N. N. N. +. 2. H. ????. William Perkin. 1856~1906. VIOLET. ORANGE. RED. YELLOW.

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De cola - PowerPoint PPT Presentation

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