Posted by markmi on April 18, 2001 at 19:56:27:
To all those having trouble inverting, take a look at this!http://www.sd81.k12.wa.us/shadle/activities/spring/invert!.jpg
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Comments: : To all those having trouble inverting, take a look at this! : http://www.sd81.k12.wa.us/shadle/activities/spring/invert!.jpg
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