| 摘要 |
A grinding unit assembly, a plurality of which is placed around a cylinder ( 12 ) of a grinding machine. Each assembly comprises a grindstone unit ( 1 ) and a metal fixture ( 16 ). The grindstone holder ( 3 ) has on one side face a positioning cutout ( 7 ), and a thinly cut grindstone ( 2 ) attached to one end of the grindstone holder ( 3 ). The metal fixture ( 16 ) has a metal body ( 17 ) having a protrusion ( 18 ) adapted to fit in the cutout ( 7 ) and a locking bolt ( 21 ).
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