| 摘要 |
The handpiece comprises an axial hollow interior (4) into which cooling fluid is conveyed via a hole (9) through the implement shaft (3). The through hole is positioned between two axially spaced apart seals pointing away from each other and sealing the handpiece head (1) containing them. The seals are in the form of washers (10,12), whose sealing surfaces run normally, conically or spherically in relation to the implements axis with the implement shaft. |
