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A 220 pound student on our team did pullups on two 4.5" di mechanical suction cups stuck to an enamel painted door jam. Also, I stuck one to the top of my washing machine and pushed it sideways as hard as I could and it would not budge. I even hit it with a hammer too and it didn't really move. There's a lot of science behind suction cups.
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Teacher/Engineer/Machinist - Team 696 Circuit Breakers, 2011 - Present
Mentor/Engineer/Machinist, Team 968 RAWC, 2007-2010
Technical Mentor, Team 696 Circuit Breakers, 2005-2007
Student Mechanical Leader and Driver, Team 696 Circuit Breakers, 2002-2004
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