| filter layer abbr. | |
| agric. | couche drainante |
| agric. construct. | couche filtrante |
| nat.res. | couche filtrante |
| transp. construct. | sous-couche drainante; couche anticontaminante; couche filtre; sous-couche anticontaminante |
|
bioactive : 14 phrases in 9 subjects |
| Agriculture | 1 |
| Environment | 1 |
| Food service and catering | 1 |
| Health care | 3 |
| Materials science | 1 |
| Medical | 2 |
| Medical appliances | 2 |
| Natural resourses and wildlife conservation | 2 |
| Natural sciences | 1 |