adjustable nozzle for positioning which is characterized by the fact that includes two plates definenti a seat for receiving the opposite ends of a flat wire forming the frontal patch bocchetta and with openings for the free reception and / or the bolt of a lock, the platelets being equipped with bushings are pivoted.threaded externally and avvitabili in holes in the ends of the flat wire are threaded.through these bushings having combined screws fastening the flat wire impegnantisi in frame line for fixing the flat wire.
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