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*** RUBBER ESTIMATION CALCULATOR ***
*** COPYRIGHT 2007 SMOOTH-ON, INC ***
*** DEVELOPED BY THOMAS SPITZNAS 03/15/2007 ***
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You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') OR 
					(knowid2 =) OR 
					(knowid3 =) OR 
					(knowid4