Overload interlock, x-ray unit (rt), английский An x-ray machine in which the presetting of voltage, current, and time are interlinked in such a way that if their product (i.e., the energy to be applied) exceeds the permissible loading of the x-ray tube, the latter cannot be energized.
Drying oven (pt), английский An oven used for drying rinse water from test pieces.