| 1 | Those are the components of an engine. | |
| 2 | The manufacture of these small components is expensive. | |
| 3 | Any of various devices of which such a spiral is the major component. | |
| 4 | The power developed by the engine is transmitted to the wheels by some essential parts. | |
| 5 | Things come into being by being composed of previously existing parts. |
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