          ‘Senteficé-1: This ‘means: that: after sewing .a  bundle-of items of one. color, an operator must’  ‘not only change the’ needle thread but also. put  in a deui bobbin.for each new color of fabric.    Sentence 2: ‘Seuiing a, bundle’ of itens:of éne:  cblor'means the bobbin and thread have to-be    changed.