File:US390721.png
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:21, 3 January 2017 | | 516 × 806 (51 KB) | 127.0.0.1 (talk) | en:Image:US390721.png 以下は元のファイルの記述 Electric system {{US patent|390721}} {{PD-US-patent}} {{PD-old-50}} |
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