Important Inventions and Discoveries in World » Exercise – 1
109. What Elisha Otis invented?
(a) The brake used in modern elevators
(b) Jet Engine
(c) Turbine
(d) Hydraulic Crane
| Subject Name : General Knowledge |
| Exam Name : UPSC, SSC, KVS, NVS, IBPS, RBI, SBI, RRB |
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