PRODUCTION, TECHNOLOGY AND RESEARCH|technology and technical regulations|technical regulations · TRANSPORT|organisation of transport|means of transport
- gairbhe dromchla Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- surface roughness
- en
- Definition measure of finer surface irregularities in surface texture Reference "Engineers' Edge 2000-2009, ""Surface Roughness Review"" http://www.engineersedge.com/surface_finish.htm [27.11.2009]"
- Comment Surface roughness Ra is the arithmetic average deviation of the surface valleys and peaks in micrometres. ISO standards use the synonymous term CLA (Centre Line Average).