ES189107A1 - Un procedimiento de saponificación de ácidos nafténicos y otros derivados del petróleo o de la pinolina, para la fabricación de jabones metálicos
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Un procedimiento de saponificación de ácidos nafténicos y otros derivados del petróleo o de la pinolina, para la fabricación de jabones metálicos
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ES189107A1949-07-161949-07-16Un procedimiento de saponificación de ácidos nafténicos y otros derivados del petróleo o de la pinolina, para la fabricación de jabones metálicos
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