Ruhnu Kàu-khu
| Ruhnu Kàu-khu Ruhnu vald |
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| — Chū-tī-thé — | |||
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| Kok-ka |  Estonia
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| Koān | Saare | ||
| Bīn-chek | |||
| - Lóng-chóng | 11.9 km2 | ||
| Jîn-kháu (2018) | |||
| - Lóng-chóng | 141 lâng | ||
| Sî-khu | EET (UTC+2) | ||
| - Jo̍at--lâng | EEST (UTC+3) | ||
| Bāng-chām | www |
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Ruhnu Kàu-khu (Estonia-gí: Ruhnu vald) sī Estonia Kiōng-hô-kok Saare Koān ê chi̍t ê chng-kha chū-tī-thé.