Τομή τα καλύτερα Επαγρύπνηση θερμόμετρο beckmann επαναλαμβάνω Φτάνω αναγγέλων
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Beckmann freezing-point apparatus and Beckmann thermometer Stock Photo - Alamy
Dr. AMAL K KUMAR - German chemist Ernst Otto Beckmann was born on this day (4th July) in 1853. He is known for inventing the Beckmann thermometer – a device used to