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1. Pure copper in China commonly known as 'purple copper' in Japan and Taiwan commonly known as 'red copper' a common grades: T1, T2, T3, TU1, TU2 b characteristics: conductive with c common uses: electrical switches, motor coils, electronic parts.

4. Bronze: a definition: the old name that tin bronze such as the ancient bell, tripod, wine ware New definition: purple, yellow, white copper other than the three categories of the collective name b according to the practical physical and chemical indicators such as hardness, strength, elasticity, high-temperature conductivity, thermal conductivity and so on the engineering composite index and have different formulations. c uses: tin-phosphor bronze, good elasticity, for lamps Spring piece, switch spring piece. Resistance welding electrode material roll welder, butt welder, touch welder, rivet welder. Chrome zirconium copper, beryllium cobalt copper.

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