h width="10%" valign="middle" align="center" nowrap bgcolor="#E0E0E0" height="15">Strength (sec/F)</th>
<th width="10%" valign="middle" align="center" nowrap bgcolor="#E0E0E0" height="15">Limit (pF)</th>
<th width="10%" valign="middle" align="center" nowrap bgcolor="#E0E0E0" height="15">Strength (sec/F)</th>
<th width="10%" valign="middle" align="center" nowrap bgcolor="#E0E0E0" height="15">Limit (pF)</th>
</tr>
<tr>
<th align="center" nowrap bgcolor="#E0E0E0" width="10%" height="23" valign="middle">Y</th>
