Easy Way To Measure Rock Surface Roughness and Joint Roughness Coefficient

[@TheAncientColossus]

Is joint roughness the same as joint condition in the RMR System?

[@UnknownSquare-o3z]

Hello, teacher.Take the liberty of disturbing you.Where can I buy Barton combs? I work for the protection of stone cultural relics in China. I think this tool can play a role in assessing the current situation of cultural relics. But I didn't find this tool in China.