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This category has the following 11 subcategories, out of 11 total.
15:
383:
281:1920s Polish military reconnaissance aircraft
37:Polish aircraft by decade of first flight
384:
367:1920s Polish military utility aircraft
347:1920s Polish military trainer aircraft
163:
334:1920s Polish civil trainer aircraft
13:
221:1920s Polish experimental aircraft
170:
162:
14:
408:
106:Aircraft of the 1920s by country
18:
397:Aircraft manufactured in Poland
201:1920s Polish military aircraft
1:
261:1920s Polish fighter aircraft
241:1920s Polish bomber aircraft
103:
34:
7:
314:1920s Polish sport aircraft
184:1920s Polish civil aircraft
10:
413:
301:1920s Polish sailplanes
146:Soviet Union and Russia
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26:Aviation portal
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150:United Kingdom
118:Czechoslovakia
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165:Subcategories
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154:United States
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41:19th century
36:
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386:Categories
188:(3 C, 2 P)
130:Germany
110:Austria
318:(21 P)
305:(18 P)
142:Poland
126:France
114:Canada
371:(2 P)
351:(5 P)
338:(2 P)
285:(4 P)
265:(3 P)
245:(6 P)
225:(2 P)
205:(5 C)
138:Japan
134:Italy
122:China
93:2020s
89:2010s
85:2000s
81:1990s
77:1980s
73:1970s
69:1960s
65:1950s
61:1940s
57:1930s
53:1920s
49:1910s
45:1900s
214:0–9
388::
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360:U
327:T
294:S
274:R
254:F
234:B
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