~ tracking down this book ~
only cover on file
Steam Shovel Mining, Including a Consideration of Electric Shovels and Other Power Excavators in Open-pit Mining.
1920258 pages~4½h read
only cover on file
Steam Shovel Mining, Including a Consideration of Electric Shovels and Other Power Excavators in Open-pit Mining.
1920258 pages~4½h read
“Stope Shovels — Wire Rope Shovels — Electric-driven Shovels — Electro-hydraulic-driven Shovels — Oil-engine-driven Shovel — Competing Machines — General Field — Dredges — Dragline Excavators.”
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