Use of Clone and ImportRow Method

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C#

C#4.0

Here DTLocal1 and DTLocal1 are two different datatable. Here are used Clone method and ImportRow method. I want to know why we use Clone and ImportRow in the following code snippet. Please explain

DataTable DTLocal1 = DTLocal.Clone();
if (DTLocal.Rows.Count != 0)
{
    for (int i = 0; i < DTLocal.Rows.Count; i++)
    {
        DTLocal1.ImportRow(DTLocal.Rows[i]);
    }
}

[edit]Code block added[/edit]