First, your question has to be translated. Do you mean brake(s)?

If so, and the person who did the brake job resurfaced the rotors, then you're probably hearing the pad lining rubbing the rough rotor surface when you apply the brakes. This is because the machines they use to resurface the rotors don't put the same smooth finish on them like a new one has. The rough surface in contact with the pad lining will make a noticeable sound until the rotors are burnished (worn smooth) from use.

On a side note: It's really not a very good idea to resurface brake rotors. They end up thinner, which makes heat dissapation more difficult. Rotors aren't that expensive. It's always best to replace them rather than resurfacing them.