The main board with newest structure has superior performance of function and stability,and the EHT is dustproof and waterproof,better to deal with the harsh and complex environment.Single print head and recovery diaphragm pump design make more stable and durable. Double mixing design prevent the ink precipitation.The nozzle valve adopts direct sealing nozzle hole structure,effectively prevent the ink leakage.IP68,RS232,network interface,counter reset,information control and other functions.