Unzip archive in which are multiple sub zip archiers?

[Csányi Pál <csanyipal@xxxxxxxxx>]

Hi,

I just get a ZIP archive and want to unzip it.

I'm using unzip to unpack this archive.

But when I did first unzip command, I get more ZIP archives, which
have again in it more ZIP archives.

Is there a command or application whic can unzip this ZIP archive and
it's sub ZIP archives at once?

-- 
Regards from Pal