Ball bearing

https://www.wikidata.org/wiki/Q11432170

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Parent
Physics 33M papers	Engineering 25M papers	Materials science 18.5M papers	Composite material 8.7M papers
Mechanical engineering 5.5M papers	Thermodynamics 5.1M papers	Lubrication 57.5k papers	Bearing (mechanical) 1 papers
Current
Ball bearing 2,002 papers
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