<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.3 katika kesi ya muundo mbili spindle, kukamilisha usindikaji mlolongo kukamilika kwa wakati mmoja, na kupunguza ufanisi na usahihi wa workpiece kutokana na clamping sekondari, na kuboresha machining ufanisi.  <response>: 3 in the case of double spindle structure, complete sequence processing is completed at one time, reducing the efficiency and precision of the workpiece due to secondary clamping, and improving the machining efficiency. 