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What are the red balls on power lines? - Quora
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What Are Those Red Balls on Power Lines in CNY?
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How They Install Those Orange Balls on Power Lines From a Helicopter - Core77
What Are Those Colorful Balls on Power Lines, Exactly? | Trusted Since 1922
Red Balls on Power Lines: Why Are They Up There? | Snopes.com
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Red power line marker balls for preventing bird / plane collisions , Finland Stock Photo - Alamy
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Red Balls on Power Lines: Why Are They Up There? | Snopes.com
Zoom out: Red balls on power lines near ... | Stock Video | Pond5
Answer Man: Colored spheres on utility poles
