Automatic machine for packing ballast under ties, imported from Switzerland, is self propelled unit mounted on four wheeled trolley; operation is by Diesel engine with four gears in both directions; speed of travel is up to 12 mph.
New machine for packing ballast
Commonwealth Engr
Commonwealth Engineer ; 37 , n 5
1949
Aufsatz (Zeitschrift)
Englisch
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Prototype Gullick-Dobson track alignment and ballast packing machine
Tema Archiv | 1984
|Engineering Index Backfile | 1948
Engineering Index Backfile | 1948