| Share | Phrase |
|---|
| 40.37% | overhead [location] camshaft |
| 27.14% | overhead [location] engine |
| 5.82% | overhead [location] valve |
| 4.87% | overhead [location] cam |
| 2.61% | overhead [location] intake |
| 2.37% | overhead [location] view |
| 2.33% | overhead [location] condenser |
| 2.14% | overhead [location] chamber |
| 2.10% | overhead [location] trolley |
| 1.87% | overhead [location] train |
| 1.67% | overhead [location] guard |
| 1.41% | overhead [location] shaft |
| 1.25% | overhead [location] type |
| 1.05% | overhead [location] arrangement |
| 0.94% | overhead [location] assembly |
| 0.79% | overhead [location] support |
| 0.60% | overhead [location] system |
| 0.57% | overhead [location] cylinder |