| drain → HasA → trap | 0.49 | |
| drain → HasA → strainer | 0.48 | |
| drain → HasA → a p-trap | 0.44 | |
| drain → HasA → overflow attribute | 0.33 | |
| drain → HasA → good working relationship | 0.32 | |
| drain → HasA → protective dressings | 0.27 | |
| drain → HasA → an on-off valve | 0.25 | |
| drain → HasA → obstruction | 0.21 |