The cat

~0⁵¹ €

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djin82 (8)

Windings of asynchronous motors

~5¹³ €

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djin82 (8)

Testing and adjustment of industrial steam boilers

~0⁵¹ €

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djin82 (8)

The unknown universe.

~0⁵¹ €

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djin82 (8)

A little book about science

~0⁵¹ €

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djin82 (8)

Encounters with comets

~0⁵¹ €

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djin82 (8)