| 摘要 |
<p>Grinding apparatus comprising a first rotatable grinding wheel (14), having a grinding surface (18) rotatable through a first working plane (140) and means (24) for presenting a workpiece with a portion in said working plane for grinding by the first grinding wheel, characterised by a second rotatable grinding wheel (34) carried with said first grinding wheel and having a grinding surface rotatable through a second working plane (42), said presenting means including guide means for guiding the workpiece from said first grinding wheel to said second working plane to present the workpiece for grinding by the second grinding wheel, said first working plane being spaced from said second working plane, whereby the portion of the workpiece ground by the second grinding wheel is ground to a different plane from the portion ground by the first grinding wheel.</p> |
