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Switches And Crossings
Formula For Ascertaining The Angles Of Crossings, The Lengths Of Switches, And The Distances Of The Points Of The Crossings (1871) »
Formula For Ascertaining The Angles Of Crossings, The Lengths Of Switches, And The Distances Of The Points Of The Crossings (1871) »
![Switches and Crossings, Formul] for Ascertaining the Angles](http://ib.boeklezers.be/images/book/5/7/6/6/113-0_list.jpg)
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