| 摘要 |
The capsule comprises a lower part (1), e.g. a box, and a cover (2) which is screwed to the lower part. The fixture screws (3) each have a shoulder (6) which works in conjunction with a stop surface preventing deformation of each expansion plate (4) during assembly. The expansion plates are blunt conical in shape and have stamped-in break lines on their surfaces which permit variation of deformation forces. Their axial length exceeds 5 mm., and alternative materials for their mfr. may be plastic, porcelain, etc. |
