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The NACA Balanced-diaphragm Dynamometer-torque Indicator
註釋A balanced-diaphragm device for measuring dynamometer torque of single-cylinder or multi-cylinder engines is described. This device, which was developed for laboratory use, has proved to be accurate, reliable, and adaptable. Compressed air, automatically controlled, is used as the balancing and the transmitting fluid; thus, a simple method of obtaining torque measurement at a remote position is provided.