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 mechanism in a completely sealed housing is particularly difficult.
Despite the countless variety of models, types of glasses for them, not so much. To make it easier to make the right choice, compare their principal, description, and characteristics.Переведено с помощью «Яндекс.Переводчик»
