| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | rotor | wind energy industry | Key component of wind turbines for converting kinetic energy of wind into mechanical power | 1 |
| 2 | rotor | wind turbine industry in Denmark | An essential part of wind turbines for converting wind energy into electrical power. | 1 |
| 3 | rotor | wind turbine industry in Scandinavian countries | An essential part of wind turbines for converting wind energy into electrical power. | 1 |