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Social Security is the third rail of American politics.

Third Rail: An Eddy Harkness Novel

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The French branch line which serves Chamonix and the Mont Blanc region () is third rail (top contact) and metre gauge. It continues in Switzerland, partly with the same third rail system, partly with an overhead line.

The French branch line which serves Chamonix and the Mont Blanc region () is third rail (top contact) and metre gauge. It continues in Switzerland, partly with the same third rail system, partly with an overhead line.

Porcelain third rail insulator pots are still manufactured by…

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DTK supplies third rail measurements (e.g. position and wear).

The French branch line which serves Chamonix and the Mont Blanc region () is third rail (top contact) and metre gauge. It continues in Switzerland, partly with the same third rail system, partly with an overhead line.

In , and in , local ordinances once required electrified to draw current from a third rail and return the current to a fourth rail, both installed in a continuous vault underneath the street and accessed by means of a collector that passed through a slot between the running rails. When streetcars on such systems entered territory where overhead lines were allowed, they stopped over a pit where a man detached the collector () and the placed a on the overhead. In the US, all these conduit feed powered systems have been discontinued, and either replaced or abandoned altogether.