дозвіл на додатковий термін служби
non-permissive environment
permissive environment
permissive instructions
permissive issue
permissive link
retention of terrain
staff retention
hydraulic retention time
retention behavior
retention index monitoring
retention of records
solid retention time
cylinder retention stud
retention flange
retention of lubricants
oil retention stability
voluntary retention on active duty
economic retention stock
retention
selective retention