[Boatanchors] radio frequency no Induction resistance

[William L Howard]

I just got a WW II Japanese item which looks like a resistance
substitution box. According to the Japanese data plate, it is a

"radio frequency no Induction resistance"

 which is  generally used in a laboratory or factory.
Laboratory and  factory use this resistance many way, like as
resistance substitution box, terminator, dummy load etc.

What is a terminator (No Arnold Swartzenegger jokes please)
and how can it be used as a dummy load?

Bill Howard