Introduction
![]() | The Earth |
5. When a stranger came to this city, he first noticed the clock, and he asked the first person, how many mainsprings and weights this clock had. When he was told: "Only one!", he was completely dumbfounded and incredulous and said: "That is impossible! So many and so different operations and only one driving force? No, no, that's not possible, it's impossible!"
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Introduction
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