CHRIS KNAPTON / SCIENCE PHOTO LIBRARY CHRIS KNAPTON / SCIENCE PHOTO LIBRARY
Electricity pylon maintenance. View of a technician working on the maintenance of a power line. He is harnessed to prevent him falling, and is wearing a hard hat for protection. He is seated on an arm of a pylon carrying an electricity cable (in background). Another electricity pylon can be seen in the background at bottom right. Pylons hold cables which carry electricity from power stations to sub-stations in cities and towns. The equipment must be in a good condition or efficiency may be lost. Power lines require constant servicing to keep them working correctly. Insulators prevent any electricity flowing through the metal pylon.
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