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Evaluation of drilled-ball bearings at DN values to three million. 1: Variable oil flow tests (1932)
NASA Technical Reports Server (NTRS) · leaf 57
Figure 36 Post-Test Appearance of Drilled-Ball Bearing S/N 2552A-1 Before Disassembly With Thrust-Loaded Inner Ring Removed 50NASA Technical Reports Server (NTRS) · Holmes · Legacy CDMS · Pratt and Whitney Aircraft
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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