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A Balanced Diaphragm Type of Maximum Cylinder Pressure Indicator (1930)
NASA Technical Reports Server (NTRS) · leaf 10
Fig.3 N.A.C.A. Technical Note No. 359 … Fig. 3 Pressure element. Parts extended in order of assemblyNASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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