Nysa Łużycka - length: ca. 225 km or 140 miles on the Polish - German border. Rising in the NW of the Czech Republic it flows into the Odra near Gubin[?] in Poland.
Nysa Kłodzka - length: ca. 244 km or 159 miles. It rises in SW Poland to join the Odra near Brzeg[?].
Nysa Szalona - length ca. 51 km, flows into Kaczawa[?] river, which in turns flows into Odra.
... covered by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by P.S.Chuang.
External links
www.gyrotwister.de ...