File:Power grid of Daido Denryoku in 1938 (50Hz).svg
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日本語: 1938年時点における大同電力の50Hz系統主要送電線概略図。60Hz系統の主要送電線概略図はFile:Power grid of Daido Denryoku in 1938.svgに分割している。
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| Author | 継之助 |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 12:54, 21 April 2020 | | 1,900 × 1,600 (85 KB) | 継之助 (talk | contribs) | {{Information |description ={{ja|1=1938年時点における大同電力の50Hz系統主要送電線概略図。60Hz系統の主要送電線概略図はFile:Power grid of Daido Denryoku in 1938.svgに分割している。}} |date =2020-04 |source ={{own}} |author =User:継之助 }} Category:Power grids in Japan |
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