A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Electronic roadside speed timer developed by division of highways
Description of two-cell photoelectric, bidirectional, electronic timer; built-in electric counter tallies traffic automatically and traffic speeds are read and recorded manually; details of complete assembly.
Electronic roadside speed timer developed by division of highways
Description of two-cell photoelectric, bidirectional, electronic timer; built-in electric counter tallies traffic automatically and traffic speeds are read and recorded manually; details of complete assembly.
Electronic roadside speed timer developed by division of highways
Calif Highways Pub Works
Rieth, W.M. (author)
1942
Illustration p 7
Article (Journal)
English
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