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Test Info:

<!DOCTYPE html>
<style>
/* In border-collapse mode, inset becomes ridge. */
table { border-collapse: collapse; border-spacing: 0 }
table, td { border-style: inset; }
td { border-width: 20px; width: 100px; height: 100px}
</style>
<table>
<tr>
<td></td>
</tr>
</table>