... HLD; 2,Hardness formats: HL,HB, HRB, HRC,HRA,HV,HS; 3, Direct Thermal Hardness tester LK110AFeatures: Based on HL hardness measuring principle, ... , average value, measurement date, impact direction, materials, hardness and other information systems. Thermal printer integrated with the ... brass), copper-tin alloy (bronze), copper, forged steel Hardness standard: HL, HB, HRB, HRC, HRA, HV,HS Display: dot ...