hra meaning

Tue, 05 May 2026 20:48:43 +0000

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