| 摘要 |
1. Machine element with a hard bearing or guiding surface (F), which contains hard bodies (1) embedded in an embedding mass (2) of plastics material, which bodies are reduced by fraction of their original height (H), characterized in that the hard bodies are made of metal and in the initial state are balls (1) of equal size, of the order of magnitude of roller bearing balls, which are disposed adjacent one another. |
