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College teachers
11
Chemical engineering
9
Machinery
4
Fluid dynamics
3
Radioactive tracers
3
Speed -- Measurement
3
Chemical engineers
2
College students
2
Condensers (Steam)
2
Space flights -- Technological innovations
2
College administrators
1
Electron microscopes
1
Engineers
1
Heat -- Transmission
1
Laboratories
1
Meetings
1
Universities and colleges -- Graduate work
1