| 摘要 |
A cover (1 ) for closing the service opening (2) of a pit casing (3), having the advantages of being both secure and being more convenient to use than existing covers. The cover (1) including an opening (4) with a hatch (5) that hinders access to the contents of the pit when closed. When the hatch (4) and cover (1) are moved to their respective closed positions the hatch (4) and cover (1) are both release-ably engaged with the pit to resist opening of the hatch and cover.
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