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Points and Switch Indicators
Points and Switch Indicators. These indicators (also termed signals) are markings for points and include a diverse group that includes unlighted, partially- and fully-lighted mechanisms. Most are two-position signals and denote whether the main or the branch line is open.
Admin добавил 09.02.2012 в 15:56 Вы можете дополнить или изменить данную статью, нажав кнопку Редактор |
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