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official telegram; (diplomatic) cable
大使館から本国へ公電が送られた。
An official cable was sent from the embassy to the home country.
緊急の公電を受けて対策を講じた。
Measures were taken upon receiving an urgent official cable.
外務省は公電の内容を公開しない。
The Ministry of Foreign Affairs does not disclose the contents of official cables.