Safety A sign warns the operator to work safely. Including the position of the different instruments for relief. Signs for the emergency phone and so on.
A security label is a label to remind workers to work with security, as well as tell the position of the machine tools used to relieve various note signs emergency phone locations, etc.
a sign is a sign of security alerts the operator to work with the security, and tell you where the tools used to relieve signs of various locations of emergency telephones, etc.