Rotating machinery explained [video cassette] : three phase AC motors. 

 - East Sussex  Audio Visual Source  19--. 
 - 4 video cassettes  sd. col.  1/2 in 
<br/><br/> VHS/NTSC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric motors, Alternating current<br/>Electric motors, Polyphase<br/>Machinery
<br/><br/><label>Dewey Class. No.: </label>621.31364 ROT 19--