01 Apr

File:JK-1 Trzmiel - experimental helicopter - ground test in Institute of Aviation – 1957.JPG

removed Category:Technology using HotCat
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Revision as of 08:39, 1 April 2013
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[[Category:Aviation in Poland]]

[[Category:Aviation in Poland]]

[[Category:Research and development in Poland]]

[[Category:Research and development in Poland]]
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[[Category:Technology]]

[[Category:Inventions]]

[[Category:Inventions]]

[[category:1957 in aviation]]

[[category:1957 in aviation]]

http://commons.wikimedia.org/w/index.php?title=File:JK-1_Trzmiel_-_experimental_helicopter_-_ground_test_in_Institute_of_Aviation_%E2%80%93_1957.JPG&diff=93729655&oldid=76133535