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P. Vasudevan
's Polls
Who invented the safety break, which stop the elevator from cr
Who invented the safety break, which stop the elevator from crashing?
A. Thomas Edison
1 vote (25%)
A. Thomas Edison
B. Eli Whitney
0 votes (0%)
B. Eli Whitney
C. Henry Ford
0 votes (0%)
C. Henry Ford
D. Elisha Otis
3 votes (75%)
D. Elisha Otis
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