Explanatory notes
… crank shaft, flywheel, inlet and exhaust valves, etc.), but differ in that the air (or sometimes air mixed with gas) … or coal tar oils, shale oils, vegetable oils (ground-nut, castor, palm, etc.). * * * The engines of this … coolers, water or oil pumps, blowers, air or oil filters, clutches or power drives, or starting devices (electric or …