| 摘要 |
The application describes a seal comprising a head and a strap, the head having a chamber with an aperture through which the end of the strap can be fed, means being provided within the chamber to engage the strap so that it cannot be pulled out in the opposite direction to which is inserted, the engaging means comprising a resilient clip having arms which can flex to provide a variable gap as the strap is pulled through. Advantageously, the clip is mounted in an insert which in turn is fitted in the chamber of the seal.
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