The design instructions for the width of two connecting parts is as follows.
Part \(C~ 39.2 mm\)
Part \(D~38.5 mm\)
Part \(D\) is to fit into Part \(C\)
The manufacturing process for Part \(C\) can guarantee a width of \(39.2 + 0.4mm\) .
The manufacturing process for Part \(D\) can guarantee a width of \(38.5 + 0.2mm\) .
Comment on the compatibility of these parts given this information.