| filter | |
| commun. el. | weighting network |
| construct. | well screen |
| el. | frequency filter; a.c.filter |
| environ. | dust arrester; dust filter; screen; strainer |
| fin. scient. | smoothing device |
| math. | filter |
|
LC : 9 phrases in 5 subjects |
| Communications | 1 |
| Electronics | 4 |
| Environment | 1 |
| General | 1 |
| Medical | 2 |