| 摘要 |
A pin for a coupling device e.g. for joining adjacent tunnel sections comprises an elongate non-metallic bar 2 and an elongate metal bar 25. The elongate non-metallic bar 2 has a first end 4, a second end 5, a central portion extending along the elongate non-metallic bar 2, first grooves 7 towards the first end 4, and second grooves 6 towards the second end 5. The elongate metal bar 25 is enclosed in the elongate non-metallic bar 2. The elongate metal bar 25 comprises indents or protrusions 26, or both, on its surface and the indents or protrusions, or both, engage the elongate nonÂmetallic bar 2. |
