cp or join: how to join binary splits?

[correasilva]

hi!

I don't know if it's my lack of unix/linux console commands knowledge, but an
equivalent from the msdos 'copy /b joined.bin + splited.025' is missing - i 
typed
'man cp' and 'info cp' and i got no suficient information about it.

As well i thaugh the 'join' command as reverse of 'split' could provide the 
result, but i got no information again from 'man' or 'info' from both 'join'
and 'split' commands

One usability example would be being able to join splits generated by an utility
from w32 named MasterSplitter - this util splits binary documents, and as choice
also generate a .bat script (which i'm seeking an equivalent .sh) like:
(5 split files, from .000 to .004):

copy splited.000 joined.bin
copy /b joined.bin + splited.001
copy /b joined.bin + splited.002
copy /b joined.bin + splited.003
copy /b joined.bin + splited.004

thanks and regards,
Paulo Silva