I think the OP is referring to "radar towers" where the tower controller has a radar screen (not VRD) & is able to give a certain level of radar service, which may or may not include vectors. Reasonably common overseas, eg Australia. However, the ADC controllers may not have a radar rating!
Male, the phraseology used would depend on why radar contact was lost & whether primary, secondary or both. Best suggestion is to ask the guy when you hear it next.
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