Gives specimen locations indicating the main principles as applied on British railways. (2500 w.) (No. 31555 G)
The indicative arrangement and location of railway signals
Bul Int Ry Cong
1912
Report
Englisch
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The arrangement of electric railway signals
Engineering Index Backfile | 1899
Engineering Index Backfile | 1910
Engineering Index Backfile | 1899
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Europäisches Patentamt | 2023
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