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CN113002592B
(zh)
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一种列车进路接近锁闭逻辑的通用处理方法
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BE509209A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US2600729A
(en)
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Endless chain of counting relays
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US2964617A
(en)
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Railway car counting system
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BE509368A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE524322A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US2122229A
(en)
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Train describer system
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CH286316A
(fr)
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Poste d'itinéraires à enclenchements électriques avec blocs de route pour la commande du trafic ferroviaire.
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BE507052A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US1383756A
(en)
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Automatic switching apparatus for telephone-exchange systems
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BE507882A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE529013A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE529014A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US1135011A
(en)
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Telephone system and apparatus.
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BE461637A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US938039A
(en)
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Apparatus and system for measuring telephone service.
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US681780A
(en)
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Signal for electric railroads.
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BE546183A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US1134933A
(en)
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Telephone switching apparatus.
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BE383895A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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SU91592A1
(ru)
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Устройство дл автоматической переездной сигнализации
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SU54490A1
(ru)
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Устройство дл автоматического указани остановок и т.п. в вагонах подвижного состава
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US1241063A
(en)
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Electric signaling system.
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BE393368A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE524321A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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