... to 3 years 2.Promotion price 3.Various colour copper contacts 1. There are other applications where current ... use carbon materials, but with a very high copper content in a variety of shapes. The complexity ... service life, typically used in warehouse systems or for cranes and hoists. Changsha Aobo Carbon Co.,LtdWebsite: ... Kaifu District, Changsha City,Hunan,China electric copper contacts for industry