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  • All fields: TTL
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    • Nebraska Tractor Test Laboratory, Records

    • Tractors--Testing; Equipment; Personnel; Haag, Agnes
    • Agnes Haag, the laboratory's secretary, measuring the latest drawbar test tracing from the recorder. She is operating a planimeter. The planimeter is used for determining the Average Drawbar Pull on the test. The test trace is recorded on a paper...
    • Nebraska Tractor Test Laboratory, Records

    • Tractors; Farm tractors; Steiger Tractor Company; Steiger tractors
    • Caption on the back of the photo reads: "John Carlile, Charly Stropes, (IH and Steiger), one Steiger employee and Jim Rolofsen who was a TTL Technician and student at the Department of Agricultural Engineering. The Oliver tractor test car is hooked...

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