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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.

Bibliographic Details
Main Author: Etzler, J. A.
Corporate Author: Making of the Modern World
Format: Online Book
Published: London : Sold by J. Cleave, 1844.
Online Access:Full text online
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