Pi | filter
| filt | |
| industr. | pressed felt; wool felt |
| industr. construct. | fine felt; felt |
| filter | |
| el. | frequency filter; a.c.filter |
| environ. | dust arrester; dust filter; screen; strainer |
| Danish thesaurus | |||
| |||
| pioner | |||
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Pi : 16 phrases in 5 subjects |
| Chemistry | 1 |
| Communications | 4 |
| Electronics | 5 |
| Finances | 2 |
| Physical sciences | 4 |