Ultrasonic welding

https://www.wikidata.org/wiki/Q580160

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Medicine 50.4M papers	Physics 33.6M papers	Engineering 25.6M papers	Materials science 19M papers
Composite material 8.9M papers	Mechanical engineering 5.6M papers	Metallurgy 5M papers	Radiology 3.2M papers
Acoustics 3M papers		Welding 218k papers
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Ultrasonic welding 1,918 papers
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