| Answer | Crossword Clue |
|---|---|
| drawtubes | DRAWTUBE, a tube that slides within another tube |
| drawtube | a tube that slides within another tube |
| drawtube | tube sliding within another tube, as the tube carrying the eyepiece in a microscope |
| klystron | brand name for a vacuum tube containing an electron gun, a resonator that changes the velocity of the electron beam in accordance with a signal (buncher resonator), a drift tube in which the electron velocity does not change, another resonator that abstra |
