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.
Acid soldering flux is a chemical used to clean and protect the area (joint) where two pieces of metal come together. Flux poisoning occurs when someone swallows this substance. This is for information only and not for use in the treatment or management of an actual poison exposure.