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<table width="200" border="1">
<tr>
<td rowspan="5">Summary 1</td>
<td colspan="2"><div align="center">1 st level</div></td>
</tr>
<tr>
<td colspan="2" data-collapsable-parent="1"><div class="P1">Parameter 1</div></td>
</tr>
<tr>
<td data-collapsable-child="1" rowspan="2">Sub level-1 </td>
<td data-collapsable-child="1" >Sub parameter (1)</td>
</tr>
<tr>
<td data-collapsable-child="1" data-collapsable-parent="2" >Sub parameter (2)</td>
<td data-collapsable-child="2" >Sub parameter (3)</td>
</tr>
<tr>
<td colspan="2"><div class="P2">Parameter 2</div></td>
</tr>
</table>
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