#link_back {
  margin: 137px 0 0 40px;
}
.link_table {
  border-collapse: collapse;
  margin: 20px 0 0 20px;
}
.link_table tr {
  height: 30px;
}
.link {
  font-size: 13px;
  width: 180px;
  border-top: 1px solid #C0C0C0;
  border-bottom: 1px solid #C0C0C0;
}
.explanation {
  font-size: 13px;
  width: 430px;
  padding: 5px 0 5px 20px;
  border-top: 1px solid #C0C0C0;
  border-bottom: 1px solid #C0C0C0;
}