Describe surface roughness and indicate how surface roughness is measured in metric and inches.
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Surface roughness refers to fine irregularities in the
surface finish and is a result of the manufacturing process used.
Roughness height is measured in micrometers, m (millionths of a meter),
or in microinches, ?in (millionths of an inch).
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To add strength to the stair assembly, a pressure-treated 2 x 4 may be fastened to the floor to serve as a _____
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