アルジェリア : 切手 [テーマ: ラジオ] : Colnect 📮
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切手カタログ › 切手 (テーマ: ラジオ)
Algiers-Annaba Radio Relay System
- カタログナンバー:
- Mi:DZ 430, Sn:DZ 331, Yt:DZ 400, Sg:DZ 437
- テーマ:
- ラジオ | 通信技術
- 発行年:
- 1964-08-30
- 有効期限:
- 1965-02-01
- サイズ:
- 40 x 26 ミリメートル
- 刷色:
- 多色
- すかし:
- 透かしなし
- デザイナー:
- Ali Ali-Khodja
- 印刷所、印刷会社:
- Paris printing office
- フォーマット:
- 切手
- 発行:
- 記念
- 目打:
- 櫛 13
- 印刷:
- 凹版
- 額面:
- 0.85 د.ج - アルジェリア・ディナール
- 発行枚数:
- 1,000,000
- スコア:
- 44% 精度: 高い
- 説明:
- The Algiers-Annaba radio-relay system was a telecommunications system that operated in Algeria。 It consisted of a network of radio towers that transmitted signals over a distance of about 600 kilometers, connecting the cities of Algiers and Annaba。 The radio-relay system was a significant technological achievement at the time, as it allowed for faster and more reliable communication over long distances than was possible with traditional telegraph or telephone lines。 However, the system was eventually replaced by more modern telecommunications technologies, such as fiber optic cables and satellite communications。
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