Evolution of crawler tractors since 1900; first construction use on Los Angeles aqueduct; modern tractor details; typical applications of track-type tractors in construction, haulage and excavation.
Crawler traction revolutionizes equipment mobility
Eng. News Rec
Engineering News-Record ; 104 , n 14
1930
5 pages
17 Figs.
Aufsatz (Zeitschrift)
Englisch
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