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"Automastische Slotengraafmachine"
Featured in "Polygoonjournaal", a Dutch news program.
An old American machine used in 1965 for digging drainage trenches and channels in Nord Brabant in the Netherlands.
Although it was easy to use, the speed of 50 to 60 meters per hours made it go extinct.
Questions?
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As seen on Wikipedia, but not yet featured on YouTube.
