Perforation

https://www.wikidata.org/wiki/Q1508510

Field Hierarchy

Parent
Engineering 25M papers	Materials science 18.5M papers	Composite material 8.7M papers	Mechanical engineering 5.5M papers
Metallurgy 4.8M papers		Punching 98.5k papers
Current
Perforation 91.6k papers
Child

Trends

Notes

History