![](http://www.alamy.com/thumbs/6/DD88F9AE-9185-4A1E-91D2-9F482EF046AA/2F6BWEN.jpg)
From the left; VECE CRAFT PRAMBERG, Bookkeeper Persson and engineer Björkman at Hallade apparatus, which is a measuring instrument that can be mounted in a railway trolley to detect and control track errors, and also compare different trolleys walking properties. The pictures taken in the state's railways, SJ SO4 2812.
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Photo credit: © BTEU/JANG / Alamy / Afripics
License: Licensed
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