coded selector造句

The translated digits were sent to the code selectors, and then the four numeric digits were sent to three switching stages in the terminating exchange ( two group selectors and a final selector ).
Local call metering must be done at the originating exchange, and when local calls were charged by distance it was preferable for the first code selector levels to determine the number of unit fees required.
It's difficult to find coded selector in a sentence. 用coded selector造句挺难的