a prize for human powered helicopters named in igor sikorsky's honor
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- a prize for human powered helicopters na..
- soft covers i e paperback don't confuse ..
- the state of being discriminated, distin..
- an action taken to prevent another actio..
- means regulations made by the minister u..
- a word or phrase that departs from strai..
- very old; having existed for a long time..
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