I think this is a UV map problem. Take a look on your UV map and look how these parts are mapped.

Well,I unwrapped only one side of the bow( I thought I can unwrap like this because bow is symmetrical),or i should have unwrapped whole bow?

You need to unwrap the whole model, because that tells where the texture goes. Then you can just edit the UV layout so the UVs for the 2 faces of the bow overlap each other, making them use the same part of the texture.

Ah ok,thank you and sorry for newbie questions :).

Yeah don't worry about asking questions ^_^ Everyone is a newb at some point.

Don't be affraid to ask questions, newbies are fundamental in groups like this one!!

Thank you guys.Problem fixed:http://i.imgur.com/0YwkxmR.jpg http://i.imgur.com/fzMha5W.jpg
(Although I still have to learn how to make good textures)

Overlapping the UVs is a bad idea because it can cause issues with your baking. If your UVs are symmetrical you start out with your layout overlapped, and then move the islands for one side exactly 8 units to the left or right (it should look like two identical layouts sitting right next to each other, one on the grid and one off) and they'll get the same texture, and you won't have to worry about an overlapped bake.