A robot cleans hard-to-reach places inside Sydney Harbour Bridge
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Robots clean depths of Sydney Harbour Bridge

19 July 2013 Last updated at 11:20 BST

Australia is using two grit-blasting robots to clean the Sydney Harbour Bridge before it is repainted.

Repainting work is a never-ending task, and the two robots - Sandy and Rosey - are to remain a permanent part of the maintenance team.

Phil Mercer reports.