Shengzhou Sigma Technology Co. Ltd. Shengzhou Sigma Technology Co. Ltd. Featured Products DSS Furnace Thermal Field High Purity Graphite Electrode... Graphite jigs for semiconducto... High Purity Graphite for Polys... Graphite boat?C/C carrier for ... DSS Furnace Thermal Field High Purity Graphite Electrode... Graphite jigs for semiconducto... High Purity Graphite for Polys... Graphite boat?C/C carrier for ... About Us