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