How to Request several docs ?

[Bruno Mannina]

Dear Solr users,

I would like to request/get several docs indexed by solr with only one 
request.

I have a schema.xml where my field PN is the key field (unique key), I 
have more than 80M docs in my index.

I have a list of PN that I want to get and I don't want to do one 
request by PN and I think it's not clean to do
PN1 or PN2 or PN3 or .....

Is it possible to do a request with PN1, PN2, PN3, etc... PNn
Where "n" can be 20 or 30 by example.

Thanks a lot,
Bruno