| Subject | English | Italian |
| agric., chem. | filtration over pre-filter | filtrazione su prefiltro |
| med. | pre-bypass filter | filtro pre by-pass |
| health. | pre-filter | prefiltro |
| comp., MS | pre-filter | filtro preliminare (A filter that excludes an event from further processing by Microsoft Operations Manager 2005. The event is not inserted in the database) |