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| View Original: | Gerstnerovo hydrometrické kyvadlo.JPG (3240x4320) | |||
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| Keywords: Gerstnerovo hydrometrické kyvadlo.JPG cs Náčrtek gerstnerova hydrometrického kyvadla 2013-04-09 15 32 30 Photo of Gerstner's book František Josef Gerstner PD-old-100 František Josef Gerstner | ||||
