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J.A. Etzler's mechanical system, in its greatest simplicity for agricultural works, formation of ditches, canals, dams, and any excavation, applanation and elevation of ground, eradicating, sawing, and removing trees, crushing and removing rocks, forming terraces on slopes of mountains and other works : patented & practically proved
- "Mechanical system, in its greatest simplicity"
- "Mechanical system, in its greatest simplicity"@en
- "J.A. Etzler's mechanical system, in its greatest simplicity for agricultural works, formation of ditches, canals, dams, and any excavation, applanation and elevation of ground, eradicating, sawing, and removing trees, crushing and removing rocks, forming terraces on slopes of mountains and other works : patented & practically proved"
- "J.A. Etzler's mechanical system, in its greatest simplicity for agricultural works, formation of ditches, canals, dams, and any excavation, applanation and elevation of ground, eradicating, sawing, and removing trees, crushing and removing rocks, forming terraces on slopes of mountains and other works : patented & practically proved"@en