… Machines and appliances for testing the hardness, strength, compressibility, elasticity or other mechanical properties …
Explanatory notes
… Machines and appliances for testing the hardness, strength, compressibility, elasticity or other mechanical properties … check goods on delivery in warehouses, etc. They may range from large mechanically, electrically or hydraulically … tons) to small portable or even pocket size instruments. Some “universal” types (e.g., for metal testing) can be used …