दो शाफ्टों को जोड़ने के लिए किस प्रकार के कपलिंग का उपयोग किया जाता है जहाँ थोड़े सापेक्ष संचलन (relative movement) या गलत संरेखण की आवश्यकता होती है?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?