Banking
  equipment

 - customer cabinets
 - deposit cells
  
  Stack racks

 - archival and
warehouse racks
 - warehouse racks
 - europallet racks
  
  Document
  cabinets

 - archive cabinets
 - accounting cabinets
   - light accountin
cabinets
   - heavy accounting
cabinets
 - customer cabinets
 - card cabinets
  
  Clothes cabinets
  
  Gun
safes/cabinets
  
  Safes

 - cabinet safes
 - office safes
 - built-in safes
 - furniture safes
  
  Metallic doors

 - anti-break-in doors
 - fire-resistant doors

   How many locks a safe should have? What type of lock is worthy to be chosen?

   If your safe is of personal type then there's absolutely no sense in paying more money for two locks. The presence of the second lock is essential when it is necessary to provide the functions that will help to control access to the safe. Such functions are the privilege of class "A" and more sofisticated safes. While your safe is a personal one what for you should control yourself?
    Please, think of how frequently will you open your case. If you are going to do it once in a couple of years than your preferred choice should be the mechanical code lock. On the contrary, if you guess that it would happen more than once per day why wouldn't you set up a lock with a key? And when there is a need to open the safe quickly and unexpectedly no other way except using electonic locking system is left.