switchyard
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Switchyard at TVA's Wilson Dam hydroelectric plant, vicinity of Sheffield, Ala., 260 miles above the mouth of the Tennessee River (LOC)
by The Library of Congress
by The Library of Congress
No known copyright restrictions(著作権制限なし)

Transmission towers in the switchyard of TVA's Chickamauga Dam, near Chattanooga, Tenn. (LOC)
by The Library of Congress
by The Library of Congress
No known copyright restrictions(著作権制限なし)

Switch yard at TVA's Wilson Dam hydroelectric plant, vicinity of Sheffield, Ala., 260 miles above the mouth of the Tennessee River (LOC)
by The Library of Congress
by The Library of Congress
No known copyright restrictions(著作権制限なし)

Section of one of the switchyards from which high tension lines carry current generated at TVA's Wilson Dam hydroelectric plant, Sheffield vicinity, Ala. Located 260 miles above the mouth of the Tennessee River, the dam has an authorized power installatio
by The Library of Congress
by The Library of Congress
No known copyright restrictions(著作権制限なし)

Transmission towers in the switchyard of TVA's Chickamauga Dam, near Chattanooga, Tenn. (LOC)
by The Library of Congress
by The Library of Congress
No known copyright restrictions(著作権制限なし)

Switchyard at TVA's Wilson Dam hydroelectric plant, vicinity of Sheffield, Ala., 260 miles above the mouth of the Tennessee River (LOC)
by The Library of Congress
by The Library of Congress
No known copyright restrictions(著作権制限なし)
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