Ballast fundamentals vital to keeping track in shape - Ballast provides a vital foundation for the railroad industry, supplying both support and drainage. Keeping ballast in good shape is a challenge that must be met.
Railway track and structures ; 105 , 3 ; 31-37
2009
Aufsatz (Zeitschrift)
Englisch
Engineering Index Backfile | 1912
|Ballast: Building and keeping a solid foundation
British Library Online Contents | 1999