| Share | Phrase |
|---|
| 11.03% | tube [does] extend down |
| 9.92% | bottom [location] extend down |
| 9.08% | cable [does] extend down |
| 8.66% | bolt [does] extend down |
| 8.53% | pipe [does] extend down |
| 8.08% | vertically [orientation] extend down |
| 7.53% | passage [does] extend down |
| 7.51% | conduit [does] extend down |
| 6.95% | passage extend down |
| 6.06% | section [does] extend down |
| 5.05% | line [does] extend down |
| 4.20% | portion [does] extend down |
| 4.17% | member [does] extend down |
| 3.14% | portion extend down |