railway RRB Technician Grade 3 Mock Test 2024 Basic Science and Engineering Levers and Simple Machines

खालीलपैकी कोणते फर्स्ट ऑर्डर लीव्हरचे उदाहरण आहे?

1
चाकांचा बॅरो
2
बाटली उघडणारा
3
मासेमारी रॉड
4
तुळई शिल्लक
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