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Safety risk level of crane operation.
| P value | Risk degree | Risk level |
|---|---|---|
| [0.80, 1.00] | Extremely dangerous | I |
| [0.60, 0.80) | Highly dangerous | II |
| [0.40, 0.60) | Significant dangerous | III |
| [0.20, 0.40) | General dangerous | IV |
| [0.00, 0.20) | Very weak dangerous | V |
