hra meaning

Thu, 30 Apr 2026 19:20:32 +0000

HRAHRBHRC HRARockwell Hardness A scale HRA60kg. HRAHRBHRC1HRA60kg ()HRB100kg1.58mm. HRAHRBHRC HRARockwell Hardness A scale HRA60kg. hrahrbhrcHRAHRBHRC1. * HRAHRBHRC.