What's the structure and working principle of mechanical clocks?
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The Mechanics of Mechanical Watches and Clocks (History of Mechanism and Machine Science, 21): Du: 9783642293078: Amazon.com: Books
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The Mechanics of Mechanical Watches and Clocks (History of Mechanism and Machine Science, 21): Du: 9783642293078: Amazon.com: Books
The mechanical watch: types, functions, care and history
Mechanical watch - Wikipedia
Automatic watch - Wikipedia
