Hoe

Hoe (letter), a Georgian letter Hoe (tool), a hand tool used in gardening and farming Backhoe, a piece of excavating equipment Codename for Hoechst AG compounds

types-of-excavating-tools-and-machineTypes of excavating tools and machine
from jigsdbest, ago in
it contains detail study about various study of excavating machine.

Excavation: Machinery, Methods and Costs, Including a Revision of …
Allen Boyer McDaniel, published 1919, 542 pages