The phrase "close links" refers to a strong connection or relationship between people, organizations, or things. It suggests that they have a strong bond or connection with each other. Full definition
Our centres of scientific expertise must continue to forge close links between industry and academia. (politics.co.uk)
With close links with a global network of galleries, publishers, dealers and private collectors, the gallery sources specific artwork requests quickly and efficiently. (widewalls.ch)
In addition to advising businesses, the firm has also maintained close links with government bodies and trade associations. (legal500.com)