bids are invited for parallel force apparatus , searle apparatus , flash point and fire point apparatus , static and dynamic balancing apparatus , universal governor apparatus , epicyclic gear train , two stroke petrol engine model , two stroke diesel engine model , four stroke petrol engine model , four stroke diesel engine model , single cylinder petrol engine test rig , single cylinder diesel engine test rig , multi cylinder petrol engine test rig , water cooler demo unit with accessories fitted in panel board , vapour compresson refrigeration test rig , window air conditioner test rig , domestic refrigerator test rig , modern steam power plant layout model with all units displayed in three dimansional , steam turbine test rig , cooling tower model , jet condenser model , de-lavel turbine model , spring loaded safety valve demo unit , differential mechanism of the tractor , cut section model of solex type carburetor , fuel pump cut section model , cut section model of four wheeler gear box , car engine demo unit fitted in stand , automobile trainer , centrifugal pump test rig , automobile chassis four wheeler total quantity : 31