|
US3645209A
|
|
Tie indexers
|
|
US3677187A
|
|
Reversible tamping bar
|
|
US3710721A
|
|
Mobile track tamper
|
|
US3605625A
|
|
Curve liners
|
|
US3602146A
|
|
Moving frame track correction machine
|
|
US3604360A
|
|
Chord liner
|
|
US3605626A
|
|
Ballast scarcity indicator
|
|
US3604117A
|
|
Apparatus for recording track errors
|
|
US3510106A
|
|
Liner assembly
|
|
US3494298A
|
|
Apparatus for aligning curves
|
|
US3523372A
|
|
Method for averaging track errors
|
|
US3391648A
|
|
Method and apparatus for track working
|
|
US3411455A
|
|
Means for continually and simultaneously surveying and aligning railroad track
|
|
CA848735A
|
|
Railway roadbed plow
|
