The professional [upgrade] manufacturers of electrical control [the hoist control] production, Shandong Lee crown of Electronic Science and Technology Co., Ltd., Tel: 15953810777 Manager Zhang hoist control is specializing in the production of high-voltage inverter rig special inverter enhance machine dedicated 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, low voltage Universal inverter and traction network leakage protection, BKT-1 enhance the comprehensive protection of the WDT-temperature data logging devices, remote power monitoring system, air compressor microcomputer protection device fan remote control system, air compressor remote control system, flameproof electric meter, portable switch, digital the hedge signal device, sound and light language signals, explosion-proof switch check station. Concurrently such as mechanical and electrical products, mining accessories, rubber products.