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elektrische Leitung
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keywords:(elektrische Leitung)
Use of helicopter for inspection of transmission network of Electricite de France
Use of helicopters for inspection of overhead lines
Light towers and helicopter speed 91 miles of 138 kv
Helicopters handle unique work load for electric utilities
Use of helicopter in erecting transmission line
Helicopter patrol indispensable to BPA
New techniques speed construction of 500-Kv line
Helicopter reduces transmission construction time 50%
Driving of deep grounds speeded by new method
Extra high voltage transmission lines in Soviet Union
Over-turning tests on foundations for railway electrification poles on sand