| Answer | Crossword Clue |
|---|---|
| TETRODES | Electron tubes. |
| TETRODES | Certain vacuum tubes |
| Answer | Crossword Clue |
|---|---|
| TETRODES | Electron tubes. |
| TETRODES | Certain vacuum tubes |
Crossword
a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.