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Tuesday, November 20, 2012
EGYPTIAN PYRAMIDS BUILDING
MY HYPOTHESIS
Sunday, June 3, 2012
ROTATING ENGINE
My concept
Variant with 3 rollers at piston
Sunday, April 22, 2012
Friday, January 20, 2012
Hybrid turbojet-turboshaft engine for VTOL AIRCRAFT
Variant of VTOL VERTOPLANE
with standard engines
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Velko Velkov
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