[English] The display problem probably occurs because your label doesn't match the scale of the original image. (I assume you are trying to replace an existing label with one of your own.) Export the original can. It will produce an .obj file, a .mtl file, and one or more image files. You have to create your labels with the same scale as the exported image because the texture mappings on the faces of the model are created that way.
If you only have models without a label you only have two options: experiment with different scales of your label image or use Blender to change the UV mapping. (UV unwrap, Cylinder projection). That last one might be necessary anyway to get a correct fit on the can.
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