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  • 3957
    P12-200-2945NA Klamath Project - Oregon-California. Laser Beam Receiving Unit shown attached to trenching machine; December 1972; Bureau of Reclamation photo by D. W. Stein
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  • 3958
    P12-200-2946NA Klamath Project - Oregon-California. View of Laser Beam Receiving Unit mounted on trencher. Note that the control panel for receiver unit is mounted to the left of controls for trencher; ...
    Citation