Kunshan GuoLi Electronic Technology Co., Ltd.(GLVAC) is a high-tech stockholding enterprise in China,specializes in developing and manufacturing electrical vacuum products. GLVAC engages in R&D, manufacturing and selling the products of HV Relays, Vacuum Capacitors, Vacuum Interrupters, DC and AC Contactors, Circuit Breakers, Hydrogen Thyratrons, Magnetrons, Spark Gaps and other vacuum electrical apparatuses. These products are mainly used in mining, military, aviation, broadcast communication, new energy (include motor vehicle), metallurgy, power, medical, semiconductor, environmental protection, industry flaw detection, security inspection and other devices. GLVAC is one of the enterprises who take most shares in domestic market.