Forum:Machina Fortress

"You can discard from your hand "Machina Fortress" and other Machine-Type monsters to Special Summon that "Machina Fortress" from your Graveyard. You can do this even if there is no other "Machina Fortress" in your Graveyard."

So can you discard Fortress and say a cyber vally to summon that Fortress and also can you discard 2 fortress to summon the same 2. I'm a little confused on this monster and would be thankful of any help.