| 摘要 |
<p>The cement finishing diamond grinding disc has a circular opening (1b) extended by a profiled cut out (Ig) to provide a non-circular overall shape. This allows insertion of a complementary coupling disc (2) on the face opposite to the external wall of the disc, with a projection (2c-d) of complementary shape and with a depth corresponding to the depth of the disc. The coupling disc is mounted on the motor shaft.</p> |
