CPC Subgroup
G01N 3/48 by performing impressions under impulsive load by indentors, e.g. falling ball (G01N3/54 takes precedence)
Full Title
Investigating strength properties of solid materials by application of mechanical stress > Investigating hardness or rebound hardness > by performing impressions under impulsive load by indentors, e.g. falling ball (G01N3/54 takes precedence)