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P. Vasudevan
's Polls
Who invented the safety break, which stop the elevator from cra
Who invented the safety break, which stop the elevator from crashing?
A. Thomas Edison B. Eli Whitney C. Henry Ford D. Elisha Otis
1 vote (100%)
A. Thomas Edison B. Eli Whitney C. Henry Ford D. Elisha Otis
a)eli whiteny b)thomas edison c) elisha otisd)henry ford
0 votes (0%)
a)eli whiteny b)thomas edison c) elisha otisd)henry ford
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