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Wróbel 1910 Aircraft
 A certain citizen of Opole built an aircraft modelled after (German) plane by H. Grade, which made a series of flights during the spring of 1910.
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Wróbel 1910 Aircraft
A certain citizen of Opole built an aircraft modelled after (German) plane by H. Grade, which made a series of flights during the spring of 1910.
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