Trefcon sī ūi-tī Hoat-kok Picardie tōa-khu Aisne séng ê chi̍t-ê commune.

Trefcon
—  Commune  —
Trefcon ê kéng-sek
Trefcon ê kéng-sek
Trefcon is located in Hoat-kok
Trefcon
Trefcon
Trefcon tī Hoat-kok ê tāi-lio̍k ūi-tì
Keng-hūi-tō͘: 49°51′28″N 3°5′43″E / 49.85778°N 3.09528°E / 49.85778; 3.09528
Kok-ka  Hoat-kok
Toā-khu Picardie
Koān Aisne
Kūn

Tē-lí

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Tī Trefcon ê sì-ûi ū Beauvois-en-Vermandois, Caulaincourt, Poeuilly, Tertry, kap Vraignes-en-Vermandois téng siâⁿ-chhī he̍k-chiá chng-siā.

Jîn-kháu

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Nî-tō͘ 1968 1975 1982 1990 1999 2007 2012
Jîn-kháu 94 86 87 83 95 82 89
Bi̍t-tō͘ (jîn-kháu/km²) 23.4 21.4 21.6 20.6 23.6 20.4 22.1

Chham-khó

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