4layer With Heavy Copper 3oz Used For Industry Control From China - oleadingpcb ( China ) - Offers to Sell and Export - Wednesday 15 November 2017 2:53 am - 4layer with heavy copper 3oz used for industry control from china 4layer with heavy copper 3oz used for industry control from china base material fr4 layercount 4layer copper thickness 3 3 3 3oz board thickn...