| 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 |
|
Tchebyscheff : 2 phrases in 1 subject |
| Communications | 2 |