During unloading by a truck crane of a wagon with pipes

During unloading by a truck crane of a wagon with pipes

During the unloading of the carriage with a truck crane, the fasteners of one bundle of pipes came loose, the pipes fell down and injured the slingers Sovkov and Toporov.
What actions should the truck crane, affected slingers and the employer take? What documents should be executed, and what should be reflected in them? Who and what responsibility can be brought?

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