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Old April 12, 2019, 10:44 AM   #26
Senior Member
Join Date: February 16, 2006
Location: IOWA
Posts: 7,633
Sorry bout that !!!

how do you know if the level is level?
Verify with a Plumb-Line. !!!!

Be Safe !!!
'Fundamental truths' are easy to recognize because they are verified daily through simple observation and thus, require no testing.
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