... Tester 1.Horizontal protrudent Indenter Design 2.internal and external testing Advanced Digital Rockwell Hardness Tester1. Horizontal protrudent Indenter ... Design, suitable also for internal and external testing.2.Advanced Digital Rockwell Hardness Tester Testing on Surfaces difficult to reach ... HRL,HRM,HRP, HRR,HRS,HRVLoad dwell duration: 2~50s, can be set and storedResolution :0.1HRDisplay:High ...