| 摘要 |
PURPOSE:To prevent the laceration of the wear-resisting liner, by keeping a narrow gap between the bolt head which has formed the reversed top-cut conical body or neck at the lower part of a cylinder and the wear-resisting liner on the meterial to be attached with the liner and, on the other hand, by inserting the bolt to the bolt hole of the material to be attached with the liner and tightening the bolt. |
