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Thin ice sign Pyyksjrvi Oulu . en Beware Thin Ice warning sign in the Pyyksjrvi lake in Oulu Finland fi Varo heikkoa jt kyltti Pyyksjrvess Oulussa own Estormiz cczero Uploaded with in Oulu April in Finland Finnish language signs Lake Pyyksjrvi Pyyksjrvi Frozen lakes of Finland Warning signs in Finland Taken with Canon EOS