NIL. <br/><br/>
HOW THINGS WORK: THE UNIVERSAL ENCYCLOPEDIA OF MACHINES VOL.2 

 - 1 
 -  Harper Collins Pub.  2003/01/14 
 -  591 
<br/><br/><label>Source: </label> Purchase  Purchased  Current Books 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applied Physics.
<br/><br/><label>Dewey Class. No.: </label>621.8  / HOW