Let Me Explain with Nandhini <br /> <br />Indian Railway Coupling System in Tamil <br /> <br />#IndianRailways <br />#CouplingSystem <br />#ManualCoupling #OneindiaTamil <br /> <br />~PR.54~ED.71~HT.302~CA.54~##~ <br /><br /> ~PR.54~CA.54~ED.71~HT.302~##~