functional recovery routines造句

This design specified a hierarchy of error-handling programs, in system ( kernel /'privileged') mode, called Functional Recovery Routines, and in user ('task'or'problem program') mode, called " ESTAE " ( Extended Specified Task Abnormal Exit routines ) that were invoked in case the system detected an error ( actually, hardware processor or storage error, or software error ).
It's difficult to find functional recovery routines in a sentence. 用functional recovery routines造句挺难的