Biznopedia was removed with the reason
weak editing.
Having a quick look through it fails the
hydraulic test.
The 3 listings on this page of biznopedia should be a clear indication of why the directory wasn't accepted:
http://www.biznopedia.com/index.php?search=hydraulic
Editing/Listing quality is currently our primary goal with the directories that we list. Those who are allowing junky/spammy site information or websites into their listings in large quantities, are not demonstrating that they understand the "we only include quality websites" guidelines.
This isn't to say the directory cannot be fixed, you just have to be willing to do it.