supply of 1)twist shaft for automatic twist lock 2)twist head for automatic twist lock , twist shaft for automatic twist lock (atl) for blc wagon to drg. no. m/s holla d co. pt. no. 71351 or equivalent. material and specification confirming to rdso technical p amphlet no. g-100 with amendment no.1 [ warranty period: 48 months after the date of delivery ] ] , twist head for automatic twist lock for blc wagon to drg. no. m/s holland co. pt. no. 70160 or equivalent. material and specification confirming to rdso technical pamphl et no g-100 with amendment no.1 [ warranty period: 48 months after the date of delivery ] ]