23 PARTS AND FITTINGS OF INTERNAL COMBUSTION ENGINES-NAMELY, PISTONS, GUDGEON PINS, CYLINDER LINERS, TAPPETS, VALVE GUIDES, SWIRL CHAMBERS, ROCKER ARMS, CYLINDER INSERTS, CIRCLIPS BEING SPRING CLIPS FOR RETAINING GUDGEON PINS IN POSITION OF USE, CRANKSHAFTS, AND TURBINE BLADES, AND DRILL BUSHES