精せい銅どう

noun

refined copper

Technical term for copper that has been purified, typically to a high degree of purity, used in industrial and metallurgical contexts.

• 精せい銅どうは電でん気き伝でん導どう性せいが高たかいため、電でん線せんに広ひろく使つかわれている。

  Refined copper is widely used for electrical wiring because of its high conductivity.