slotted section

slotted section

[′släd·əd ‚sek·shən]
(electromagnetism)
A section of waveguide or shielded transmission line in which the shield is slotted to permit the use of a traveling probe for examination of standing waves. Also known as slotted line; slotted waveguide.
References in periodicals archive ?
The unit will cater for both singles and LP's and the lid can be closed whilst playing LP's thanks to the slotted section. Speeds can be adjusted to both 33.3 and 45rpm and the sound from the integral twin stereo speakers is crisp and clear.