Oostrum (Friesland)
Oostrum sī Hô-lân Friesland séng Dongeradeel chū-tī-thé lāi-bīn ê chi̍t ê chng-thâu.
| Oostrum | |||
| — Chng-thâu — | |||
 Oostrum (2010)
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  Oostrum |
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| Keng-hūi-tō͘: 53°19′50″N 6°3′40″E / 53.33056°N 6.06111°E | |||
| Kok-ka |  Hô-lân
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| Séng | Friesland | ||
| Chū-tī-thé | Dongeradeel | ||
