At the object level . Permissions allowed or denied at the object level apply to the entire object. For example, you can set an object-level permission on an OU object that allows a particular group, such as Account Operators, to create child objects in the OU. At the property level .
Ball mills are used in chemistry and in industry to grind hard solids to a very fine powder. They are very similar to rock tumblers. Basically, the idea is to rotate a container filled with heavy metal balls that crush the substance that you want to grind.
A device used to grind coffee beans. verb. To grind is defined as to crush, reduce to a powder using friction or to rub two surfaces together forcefully. An example of to grind is using a mortar and pestle to turn cumin seeds into cumin powder.