CSS - additional rule for specific internal tag

I want to create a style rule (class) and give it in the <TABLE> tag (e. g. <TABLE CLASS="blah">. But whenever there is a <TD> in the table, I want an additional rule for the td (e. g. give a border to that td, but not to each element in the td, or any other element in the table), without having to write another class and then do <TD CLASS="blah1">. This is to avoid typing multiple <TD CLASS="blah1"> with each cell and therefore to cut down on HTML cource code.

So my HTML would look like:

<TABLE CLASS="blah">
   <TR>
      <TD>something
      </TD>
   </TR>
   <TR>
      <TD>something
      </TD>
   </TR>
</TABLE>

Code (markup):

instead of

<TABLE CLASS="blah">
   <TR>
      <TD CLASS="blah1">something
      </TD>
   </TR>
   <TR>
      <TD CLASS="blah1">something
      </TD>
   </TR>
</TABLE>

Code (markup):

Does anyone have any idea how I write the style sheet? I tried this:

.blah,
.blah a: link,
.blah a: visited
{ primary rules }
td.blah: { additional rule for td }

Code (markup):

but it does not work.

Thank you very much for your time!

 

You would need to use:

.blah td

to reference the <td>s in that case.