книги Наука, техника, медицина Техника ГОСТы, стандарты

Permanent way (history)

Код 3468099

  • ISBN: 978-5-5093-0604-4

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Аннотация к книге "Permanent way (history)"

High Quality Content by WIKIPEDIA articles! The permanent way is the elements of railway lines: generally the pairs of rails typically laid on the sleepers ("ties" in American parlance) embedded in ballast, intended to carry the ordinary trains of a railway. It is described as permanent way because in the earlier days of railway construction, contractors often laid a temporary track to transport spoil and materials about the site; when this work was substantially completed, the temporary track was taken up and the permanent way installed.

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ISBN: 978-5-5093-0604-4

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