Lever, wheel and axle, pulley [video recording]. 

 - Cubao, Quezon City :   AGC Educational Media,  c?. 
 - 1 videodisc (VCD): col., sd.;   4 3/4 in. 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>VCD  621.8 L5769 c?.