1. 
   self-contained self-rescuer
   (from the article `coal mining`) ...more effective emergency preparedness plans and procedures, and major changes in legislation, regulation, and enforcement, higher standards of ...
   Found op http://www.britannica.com/eb/a-z/s/61
   
   
2. 
   Self-rescuer
   A small filtering device carried by a coal miner underground, either on his belt or in his pocket, to provide him with immediate protection against carbon monoxide and smoke in case of a mine fire or explosion. It is a small canister with a mouthpiece directly attached to it. The wearer breathes thr...
   Found op http://www.coaleducation.org/glossary.htm
   
   

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