... HL,HB, HRB, HRC,HRA,HV,HS; 3, Direct Thermal Hardness tester LK110AFeatures: Based on HL hardness measuring principle, can detect various ... date, impact direction, materials, hardness and other information systems. Thermal printer integrated with the instrument as a whole, working quiet ... group (the impact of the number of 32 ~ 1)Thermal printer, working quietly, can be printed any number of copies ...