High Quality Content by WIKIPEDIA articles! Pandrol is a British company, which manufactures clips used on rail tracks.It was first developed in 1959 by a Norwegian railways engineer, Per Pande Rolfsen. Nowadays it is worldwide-spread. Pandrol has plants in 12 countries and 82 markets. Over 240 railway systems in 91 countries adopted its products. The original clip is now called the "PR-clip". The clip has to be manufactured with the right amount of tempering (or springiness) so that it exerts the right amount of force on the rail foot to hold it in place, but not so much force that the clip cannot be inserted or withdrawn.

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