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"Science and science fiction, how do you even distinguish the two?"
- Jerry Pournelle

Electric-Powered Caterpillar Shovels  
  Mining equipment powered by electricity.  

Four hours later, dropping toward the Moon, Cartwright was amazed at the change that a month — and a few of his millions— had made in the central peak of Arzachel, now a hive of activity.

Busy figures in white swarmed over the mountain. Big electric-powered caterpillar shovels had already leveled the mile-high summit. And the excavations were already in progress, for he saw gray slopes of rubble beneath the black mouths of half a dozen tunnels.

Technovelgy from The Fortress of Utopia, by Jack Williamson.
Published by Startling Stories in 1939
Additional resources -

Compare to the electric tractor from World of Purple Light (1936) by Warner Van Lorne.

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Additional resources:
  More Ideas and Technology from The Fortress of Utopia
  More Ideas and Technology by Jack Williamson
  Tech news articles related to The Fortress of Utopia
  Tech news articles related to works by Jack Williamson

Electric-Powered Caterpillar Shovels-related news articles:
  - Caterpillar Electric Mining Loader Not Yet Ready For Moon

Articles related to Vehicle
Waymo And Tesla 'Autonomous Cabs' Are Piloted By Remote Drivers
Maybe It's Too Soon To Require Autonomous Mode
Caterpillar Electric Mining Loader Not Yet Ready For Moon
Engineer Creates Crazy Motorized Track Hospital Bed

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