| 1. | The workpiece is already on the lathe .
工件已经上了车床。 |
| 2. | Work-holding devices are called jigs and fixtures .
工件夹持装置叫做钻模或夹具。 |
| 3. | The carriage feeds the tool while the workpiece rotates .
当工件旋转时，拖板送进刀具。 |
| 4. | The scored jaws of a vise help it bite the work .
台钳上有刻痕的虎钳牙帮助它紧咬住工件。 |
| 5. | Fig. 66 shows the sort of work produced by this process .
图66所示是用这种方法生产出来的工件。 |
| 6. | We used grinding machines only to smooth and finish a workpiece .
我们只是用磨床将工件抛光和精加工。 |
| 7. | The grinding machine raises the precision of the workpiece and improves its surface finish .
磨床可以提高工件的精度与表面的光洁度。 |
| 8. | The surface of the table is cut with t slots so that workholding devices such as the vise can be clamped to them .
工作台的表面切有T形槽以便工件夹具，如台钳，能固定在T形槽上。 |
| 9. | When face milling is performed, the table can be moved longitudinally to feed the workpiece under or below the cutter .
铣削端面时，为了将工件送到刀具底下或下方，工作台可以纵向移动。 |
| 10. | The metal cutting tool separates chips from the workpiece in order to cut the part to the desired shape and size .
为了要把加工的零件切削成所要求的形状和尺寸，金属切削刀具就要从工件上切除切屑。 |
