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水底电缆电报 水线电报制
submarinecabletelegraphsystem
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水底电缆电报
submarine cable telegraph system submarine telegraphy
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水线电报制
submarine cable telegraph system
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海底电报局;海底电报,水线电报。
cable station
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水底电报
submarine telegraphy
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水线电报
cable message cablegram submarine telegraphy
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电缆, 海底电报, 缆, 索
cable
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海底电报无线电报公司
italcable servizi cablografici radiotelegrafici e radioelettrici s.p.a
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水底电缆
subaqueous cable submarine cable
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水线电报发报机
cable tra mitter cable transmitter
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带间电报制
interband telegraphy
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双工电报制
duplex telegraph system
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双音电报制
two tone telegraph system
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四音电报制
four tone telegraph system four-tone telegraph system
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梯形电报制
echelon telegraphy
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打海缆电报
cabling
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海缆电报
cablegram
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打海底电报
cable
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