Power plugs are used in a wide range of applications. All industries, large and small, may need power plugs. It does not mean that “where electricity is needed, there are power plugs”. Simply talk about the main industries
Household appliances: The closest thing to our lives is the power plugs on household appliances. Televisions, refrigerators, electric fans, air conditioners, etc. all need to be used and must use power plugs.
Communication field: Usually we also use power plugs in various communication fields, such as telephones, wire receiving towers, aviation equipment and so on.
All kinds of production equipment used in the factory need power plugs. In short, there is one sentence: "Where electricity is needed, there are power plugs.