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Hi my name is Robert...
You could have a short at one of the outlets, what I would do is remove the fuse and disconnect the wires to the outlets one at a time, see if the fuse still blows, if it does not blow when you have the outlet disconnected I would replace it, sometimes these outlets can fail and the only way to tell is disconnect the wiring to them and see if that fuse blows.
IF you have more questions or concerns please feel free to contact me..... Robert