Copper：Copper has been widely used in many fields due to its excellent electrical conductivity, thermal conductivity, ductility and corrosion resistance. With the development of science and technology, the application field of copper is constantly expanding, and its importance is becoming increasingly prominent.

Oxygen-free copper：Oxygen-free copper is a type of copper with extremely high purity, characterized by an extremely low oxygen content, usually less than 0.003%. Since the presence of oxygen reduces the electrical and thermal conductivity of copper and affects its processing properties, oxygen-free copper is widely used in fields that require high-purity copper.

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