..well-fitting enclosure for them
A backplate is a plate protecting the back of a person who is fighting, or the metal plate on the rear of the casing of a computer.
what are the advantages of a metal plate
Armour plating is heavy plate steel, or other strong metal, used to create armour on a structure or vehicle.
The onlyl thing that comes to mind is the metal used in truck tool boxes or for step plates that has an embosed diamond pattern on it.
You have to get metal sticks and mound 4 around a plate and the get a metal ring and mound it on to the 4 metal sticks
no
Yes; An astrolabe is a star map drawn on a metal plate.
A divergent plate boundary helps create land, which means that it can create a big land piece, such as, a continent.
No.
a plate heat exchanger is a metal plate which is will be in contact with another item eg air or another metal object to move heat from one to another
They create new crust.
It would be very unusual to plate an already plated metal in another metal. I suppose you could plate it again, it is just another process, but why would you?