noun
[ U ] the fact of providing help to customers after they have bought a product, usually involving doing repairs that are needed or giving advice on how to use the product
noun
[ U ] the fact of providing help to customers after they have bought a product, usually involving doing repairs that are needed or giving advice on how to use the product
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005