On 4/17/2011 4:54 PM, Steve B wrote:
I need one of those pen contraptions that you roll over blueprints and
aerial photos that then give a numerical value to the distance traveled.
What are they called, and what's a good supplier of them?
Steve
Heart surgery pending?
www.cabgbypasssurgery.com
Heart Surgery Survival Guide
Try opisometer
--
bud--