The image below is a schematic flow diagram of a typical oil refinery that depicts the various unit processes and the flow of intermediate product streams that occurs between the inlet crude oil feedstock and the final end products.
In order to check-in into a hotel, the person must be 21 years old.  If the person is younger than 21, then a parent or guardian can  give permission for them to check-in. 1 person found this useful.
In Mississippi and Nevada (the only two that I'm familiar with) you can get into the building at any age, but you must be 21 or older to be on the â¦gaming floor. You can pass through, for instance, to go to the restaurant, but under 21, you cannot stop or linger in the gaming area. 3 people found this useful.