EBF 1929 15min si b&w $24 Produced by Eastman Teaching Films, Inc. Animated drawings show the four strokes of each cycle; intake, compression, power and exhaust; the fuel system of a gas engine is traced; the principle of the spark coil is illustrated and the air-cooled system is compared with circulatory water-cooling
XD8458 Four Stroke Cycle Gas Engine Eastman Classroom Film 1929
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