Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1303-8855-3 |
Объём: | 100 страниц |
Масса: | 172 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
High Quality Content by WIKIPEDIA articles! North American railroad signals generally fall into the category of multi-headed electrically lit units displaying Speed based or weak route signaling. Signals may be of the searchlight, colour light, position light or colour position light type each displaying a variety of aspects which inform the locomotive engineer of track conditions so that he/she may keep their train under control and able to stop short of any obstruction or dangerous condition.
Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.