Abstract is: The Keystone XOK was an American biplane observation floatplane developed for the United States Navy during the early 1930s.
prototype aircraft model | Q15126161 |
observation airplane | Q125879412 |
P2671 | Google Knowledge Graph ID | /g/11f3n3nd9v |
P176 | manufacturer | Keystone Aircraft | Q1740353 |
P798 | military designation | XOK-1 |
Keystone XOK | wikipedia |
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