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What is the resistance, is measured in what?For a wristwatch in addition to mechanical damage, external sources of danger can be called a magnetic field,dust and water. Technological progress is by leaps and bounds, it seems that to place the clock mechan..

With time and improvement of technology watches have become more complicated and new features. Some very specific, but no less interesting and useful. Some of these improvements can be called a chronograph and a tachymeter.That is why the need for such me..

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