I read this as: Carry-On Trailer Dealers, that are also Trailer Dealers in Charlotte, NC.
The same question as a structured link: https://locationlists.com/find?dataset=carry-on-trailer&relate=same_place&also=b&b.category=trailer-dealers&b.city=Charlotte&b.state=NC

LocationLists: Carry-On Trailer Dealers that are also Trailer Dealers, state = NC, city = Charlotte

Base (a): Carry-On Trailer Dealers. 4,929 places.
Set b: Trailer Dealers, state = NC, city = Charlotte. 8 places.

Same place: the same street address and ZIP, or within 60 m with a shared name word.

Every region of the overlap (base rows):
- base only: 4,929
- in b: 0

0 base places match the question.

Technical details (developers and AI agents): JSON: https://locationlists.com/find?dataset=carry-on-trailer&relate=same_place&also=b&b.category=trailer-dealers&b.city=Charlotte&b.state=NC&format=json