Definition of roof bolt in English:
A tensioned rod anchoring the roof of a working to the strata above.
- The protracted closure of the main pool for three months after the failure of a couple of roof bolts, and the lack of publicity for the training pool's availability, meant many customers simply ‘lost the habit’ of visiting their local pool.
- She stated in her letter that the pool was closed for repair work for three months due to a couple of roof bolts.
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