| 摘要 |
<p>A circular saw blade of centerless type which has a sawing depth greater than the radius of the circle, comprises an annular blade and at least one central disc provided inside the annular blade. The central disc contains at least one conduit or passage for a fluid, e.g. for a coolant or a flushing agent to the part of the disc which lies within the region of the maximum sawing depth.</p> |
