型号: 6N-P4030 线材类别: 电源线 材质: 纯铜 价格：300/米 声音细腻、有密度、其层次干净清晰、...
True Purity of the 7N-P4030 II Various manufacturers claim to produce ultra high purity, 7N (99.99999%) copper. However, different refining processes yield materials that vary greatly in both the composition of impurities and crystalline structure. Most of the "so called" 6N and 7N materials ar...