Weld defence barrier

Defence barrier is a physical or psychological obstacle designed to protect against potential threats or attacks. It can be a physical structure such as a wall, fence, or barricade that prevents unauthorized access or provides a shield against projectiles. 

It can also refer to a psychological or emotional barrier that helps individuals or groups maintain their safety and security by setting boundaries, asserting rights, or developing coping mechanisms. Defence barriers can be found in various contexts, including military operations, personal safety, cybersecurity, and interpersonal relationships.