| 摘要 |
At least one of the blades (18) has a support (20) which defines the contact between the blade and concrete surface. The support protrudes in the axial direction by a distance of 0-5 mm relative to the front edge of the blade. The tool has one or more segments (14-16) mounted on a rotary support plate (12), each of which has at least one blade protruding from a mounting disc (19). |
