supply of machines and laboratory equipment’s for mechanical engineering in the premises of government polytechnic buxar- 01 radial drilling machine 02 gas welding /cutting machine - 01 universal force table apparatus 02 simply supported beam 03 combined inclined plane and friction slide 04 screw jack 05 lami’s theorem 06 coefficient of friction between different materials 07 centroid of different geometrical figures. 08 jib crane 01 single cylinder 4 stroke diesel engine test rig 02 single cylinder 2 stroke diesel engine test rig 03 single cylinder 2 stroke petrol engine test rig 04 heat transfer through composite wall apparatus