'(<a href="http://www.j-archive.com/media/2006-05-18_J_26.jpg" target="_blank">Jon of the Clue Crew uses a power tool.</a>)  The belt drive used in many devices is basically two of these simple machines'
pulleys
MACHINERY: The belt drive used in many devices is basically two of these simple machines
The belt drive used in many devices is basically two of these simple machines
The belt drive used in many devices is basically two of these simple machines
MACHINERY
pulleys
MACHINERY