| Answer | Crossword Clue |
|---|---|
| tachometers | TACHOMETER, instrument for measuring speed of rotation |
| tachometer | instrument for measuring speed of rotation |
| tachograph | an instrument for recording speed of rotation |
| tachographs | TACHOGRAPH, an instrument for recording speed of rotation |
| tachogram | a record made by a tachograph, an instrument for recording speed of rotation |
| tachograms | TACHOGRAM, a record made by a tachograph, an instrument for recording speed of rotation |
