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английский) 2:
[копия]Скопировано!
Environments are pulled into the so-called optical fiber, which is the core of a denser glass, in terms of representing circumference and often called lightguide. This core is coated with a shell of less dense glass, which is reached by which the signal is transported will be fully displayed. To prevent mechanical damage construction is also provided with a protective sheath, called a primary coating.
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