File:Railwaywoodscrossbarsignal.png
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Summary
| Description |
中文：铁路用木横版信号机，19世纪30年代开始使用，配有可选转的横向木板来显示开/闭信号。当横版转至与线路平行位置时，意味着列车可安全同行。 |
| Date | |
| Source | Own work |
| Author | Charlie fong |
Licensing
I, the copyright holder of this work, hereby publish it under the following license:
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:53, 12 June 2020 |  | 165 × 392 (25 KB) | Charlie fong | Uploaded own work with UploadWizard |
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