Illustrated description of methods and equipment employed in driving 32 rods at 16 locations, total of 664 ft of rods, in 670 min; Roto-drive ground-rod driver consists of revolving chuck driven by small gasoline engine; rod is rotated while pressure is applied by weights or by workman.
Driving of deep grounds speeded by new method
Elec Light Power
Electric Light and Power ; 22 , n 12
1944
2 pages
Aufsatz (Zeitschrift)
Englisch
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