Is the practice of removing bolt of a flanged joint in a piping system, after the system has been fully de-pressurised, or considered dead and ready for maintenance.
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Odd. Even + Even = Even Odd + Odd = Even Odd + Even = Even + Odd = Odd
49 is an odd number numbers ending in 1,3,5,7,9 are odd.
23 is an odd number.
odd
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