when user exit will get trigger

HI

I wanted to know when the following user exits will get trigger. i wanted know each exits.

EXIT_SAPMM06E_006

EXIT_SAPMM06E_007

EXIT_SAPMM06E_008

EXIT_SAPMM06E_009

EXIT_SAPMM06E_012

EXIT_SAPMM06E_013

EXIT_SAPMM06E_014

EXIT_SAPMM06E_016

EXIT_SAPMM06E_017

EXIT_SAPMM06E_018