<!DOCTYPE html>
<style>
div {
  float: left;
  width: 200px;
  height: 300px;
}
table {
  border-collapse: collapse;
}
tr {
  page-break-inside: avoid;
  border: 10px solid blue;
}
td {
  width: 80px;
  height: 200px;
}
td + td {
  border-top: 20px solid green;
  border-bottom: 20px solid green;
}
</style>
<div>
  <table>
    <tr><td></td><td></td></tr>
  </table>
</div>
<div>
  <table>
    <tr><td></td><td></td></tr>
  </table>
</div>