Perforation

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

Field Hierarchy

Parent
Engineering 25.7M papers	Materials science 19M papers	Composite material 8.9M papers	Mechanical engineering 5.6M papers
Metallurgy 5M papers		Punching 100k papers
Current
Perforation 93.4k papers
Child

Trends

Notes

History