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This category has the following 6 subcategories, out of 6 total.
15:
312:
313:
35:Mailplanes by decade of first flight
178:
160:Miscellaneous aircraft of the 1920s
13:
185:
177:
14:
337:
18:
296:1920s United States mailplanes
113:Military aircraft of the 1920s
1:
236:1920s Czechoslovak mailplanes
7:
196:1920s Australian mailplanes
68:Civil aircraft of the 1920s
10:
342:
216:1920s British mailplanes
276:1920s German mailplanes
256:1920s French mailplanes
326:1920s civil aircraft
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170:Special-purpose
26:Aviation portal
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137:Reconnaissance
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180:Subcategories
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166:Experimental
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76:Agricultural
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321:Mailplanes
315:Categories
88:Sailplanes
84:Mailplanes
145:Transport
149:Utility
141:Trainer
129:Fighter
100:Utility
96:Trainer
300:(16 P)
155:
133:Patrol
125:Bomber
121:Attack
106:
92:Sports
280:(5 P)
260:(8 P)
240:(1 P)
220:(1 P)
200:(1 P)
80:Cargo
54:1940s
50:1930s
46:1920s
42:1910s
317::
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258:
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289:U
269:G
249:F
229:C
209:B
189:A
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