Groh, Heinrich <br/><br/>
Explosion protection : electrical apparatus and systems for chemical plants, oil and gas industry, coal mining 
Heinrich Groh 
 -  c.2004 
<br/><br/><label>ISBN: </label>0750647779 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mine gases--EE
<br/><br/><label>Dewey Class. No.: </label>628.922 GRO