| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | rotor | aviation industry | A critical component in aircraft engines for generating lift and propulsion | 1 |
| 2 | rotor | aviation industry | Critical component of helicopters and airplanes for providing lift and propulsion | 1 |
| 3 | rotor | aviation industry in Western countries | A critical component of helicopters and airplanes for generating lift and propulsion. | 1 |
| 4 | rotor | aviation industry in the US | A crucial component of helicopters and airplanes for achieving lift and propulsion. | 1 |