Professional manufacturing - automation and control systems, Shandong Lee crown of Electronic Science and Technology Co., Ltd., Tel: 15953810777 Zhang, the company is specialized in producing high-voltage inverter, rig special inverter enhance machine special inverter frequency heating power, constant pressure water supply control cabinet, high voltage inverter series, KJPT series of mine explosion-proof and intrinsically safe type inverter, electric submersible pump voltage inverter, a variety of low voltage general purpose inverter and traction network leakage protection, BKT-1 to enhance the comprehensive protection, WDT- a temperature logging devices, remote power monitoring system, air compressor microcomputer protection device fan remote control system, air compressor remote control system, the flameproof electric meter, portable switch, digital hedging signal device, sound and light language signal , explosion-proof switch check station. Concurrently such as mechanical and electrical products, mining accessories, rubber products.