Explains the use of bolt locks in an interlocking system, describing weak points in present practice, and the method of electrical bolt locking. (1800 w.) (No. 91438)
Bolt locking
R R Gaz
1908
Aufsatz (Zeitschrift)
Englisch
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NTRS | 1983
|NTRS | 1983
|Europäisches Patentamt | 2021
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