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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
(show.php)
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US2964617A
(en)
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Railway car counting system
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BE509368A
(show.php)
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BE524322A
(show.php)
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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
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US1383756A
(en)
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Automatic switching apparatus for telephone-exchange systems
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BE507882A
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US1393728A
(en)
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Telephone-exchange system
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BE529013A
(show.php)
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BE529014A
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US1135011A
(en)
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Telephone system and apparatus.
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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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SU289010A1
(ru)
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УСТРОЙСТВО дл АВТОМАТИЧЕСКОГО УЧЕТА
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BE546183A
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US1134933A
(en)
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Telephone switching apparatus.
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BE383895A
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US1858832A
(en)
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Circuit arrangement for stepping switches
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BE393368A
(show.php)
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Marindin et al.
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Discussion on “Electrically interlocking the block and mechanical signals on railways” |
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GB557931A
(en)
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Improvements relating to route control apparatus for railways and the like
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BE545515A
(show.php)
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