| 摘要 |
<p>The device (13) is assembled of a grinding disk attached to a carrier (21) and a drive shaft (12) inserted into a hub (11) in the center of the disk (21). The upper segment of the shaft (12) is provided with three wedge shaped elevations (14) engaging with matching depressions (14') at the inner surface of the hub (11). A projection (24) protruding from the outer surface of the shaft (12) has to be additionally inserted into a matching groove (25) at the hub (11). A collar (22) prevents the shaft (12) from being guided too far into the opening (11).</p> |
