सेफ्टी ब्रेक का आविष्कार किसने किया, जो लिफ्ट को दुर्घटनाग्रस्त होने से रोकते हैं? - Study24x7
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Rohit Nagar
04 Mar 2019 07:22 PM study24x7 study24x7

 सेफ्टी ब्रेक का आविष्कार किसने किया, जो लिफ्ट को दुर्घटनाग्रस्त होने से रोकते हैं?
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A

एली व्हिटनी 

B

थॉमस एडिसन

C

हेनरी फोर्ड

D

एलीशा ओटिस

SSC Railways
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