Revision history of "15 kV, 16.7 Hz AC railway electrification" (Q1415234)

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15 January 2024

11 October 2023

6 September 2022

16 August 2022

8 June 2021

20 April 2021

17 January 2021

5 January 2021

15 December 2020

26 May 2020

17 May 2020

9 April 2020

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29 December 2019

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3 October 2018

26 August 2018

5 July 2018

29 June 2018

26 May 2018

4 May 2018

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7 February 2018

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