… for testing the hardness, strength, compressibility, elasticity or other mechanical properties of materials (for example, metals, wood, textiles, paper, plastics). …
Explanatory notes
… for testing the hardness, strength, compressibility, elasticity or other mechanical properties of materials (for … operation, (e.g., for testing large output off an assembly line). Test results may be ascertained either by direct reading (sometimes with the aid …