词汇 | position-light signalling |
释义 | Definition of position-light signalling in English:position-light signalling(US position-light signaling) noun Railways
OriginEarly 20th century; earliest use found in Electric Railway Journal. Definition of position-light signalling in US English:position-light signalling(US position-light signaling) noun Railways
OriginEarly 20th century; earliest use found in Electric Railway Journal. |
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