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Underground Railway Device Saves Weight, Cost and Improves Safety

SpecialChem / Nov 1, 2007

When you are working on electrified underground rail lines, it pays to know whether the current is on or off. Tube Lines, a UK company responsible for the upgrading of the Jubilee, Northern and Piccadilly lines, previously used a hand held 'current rail indicator device' (CRID) for this purpose.

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